/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:10:10,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:10:10,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:10:10,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 15:10:10,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 15:10:10,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 15:10:10,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 15:10:10,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 15:10:10,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 15:10:10,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 15:10:10,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 15:10:10,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 15:10:10,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 15:10:10,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 15:10:10,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 15:10:10,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 15:10:10,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 15:10:10,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 15:10:10,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 15:10:10,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 15:10:10,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 15:10:10,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 15:10:10,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 15:10:10,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 15:10:10,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 15:10:10,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 15:10:10,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 15:10:10,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 15:10:10,449 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 15:10:10,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:10:10,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:10:10,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:10:10,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:10:10,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:10:10,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:10:10,490 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:10:10,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:10:10,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:10:10,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:10:10,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:10:10,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:10:10,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:10:10,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:10:10,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:10:10,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:10:10,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:10:10,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:10:10,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:10:10,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:10:10,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:10:10,493 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:10:10,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:10:10,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:10:10,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:10:10,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:10:10,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:10:10,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:10:10,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:10:10,494 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:10:10,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:10:10,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:10:10,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:10:10,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:10:10,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:10:10,852 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:10:10,853 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:10:10,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl [2021-08-06 15:10:10,854 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl' [2021-08-06 15:10:10,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:10:10,903 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:10:10,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:10:10,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:10:10,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:10:10,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:10:10" (1/1) ... [2021-08-06 15:10:10,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:10:10" (1/1) ... [2021-08-06 15:10:10,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:10:10,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:10:10,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:10:10,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:10:10,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:10:10" (1/1) ... [2021-08-06 15:10:10,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:10:10" (1/1) ... [2021-08-06 15:10:10,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:10:10" (1/1) ... [2021-08-06 15:10:10,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:10:10" (1/1) ... [2021-08-06 15:10:10,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:10:10" (1/1) ... [2021-08-06 15:10:10,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:10:10" (1/1) ... [2021-08-06 15:10:10,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:10:10" (1/1) ... [2021-08-06 15:10:10,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:10:10,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:10:10,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:10:10,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:10:10,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:10:10" (1/1) ... [2021-08-06 15:10:10,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:10:10,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:10,996 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) [2021-08-06 15:10:11,006 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 [2021-08-06 15:10:11,042 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:10:11,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:10:11,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:10:11,043 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:10:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:10:11,043 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:10:11,043 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:10:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:10:11,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:10:11,043 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 15:10:11,043 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 15:10:11,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 15:10:11,044 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-06 15:10:11,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-06 15:10:11,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-06 15:10:11,045 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 15:10:11,533 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:10:11,533 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-06 15:10:11,534 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-06 15:10:11,534 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-06 15:10:11,535 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-06 15:10:11,535 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-08-06 15:10:11,536 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:10:11 BoogieIcfgContainer [2021-08-06 15:10:11,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:10:11,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:10:11,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:10:11,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:10:11,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:10:10" (1/2) ... [2021-08-06 15:10:11,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359792ff and model type commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:10:11, skipping insertion in model container [2021-08-06 15:10:11,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:10:11" (2/2) ... [2021-08-06 15:10:11,542 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-2.wvr.bpl [2021-08-06 15:10:11,546 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:10:11,546 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:10:11,546 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:10:11,546 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:10:11,577 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-06 15:10:11,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:10:11,617 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, mConcurrency=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 [2021-08-06 15:10:11,617 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-06 15:10:11,625 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-08-06 15:10:11,637 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 49 states, 48 states have (on average 3.4375) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 48 states have (on average 3.4375) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:11,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 15:10:11,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:11,646 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:11,646 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:11,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:11,650 INFO L82 PathProgramCache]: Analyzing trace with hash -407233692, now seen corresponding path program 1 times [2021-08-06 15:10:11,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:11,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995911093] [2021-08-06 15:10:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:11,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:11,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:11,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995911093] [2021-08-06 15:10:11,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995911093] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:10:11,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:10:11,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 15:10:11,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920238954] [2021-08-06 15:10:11,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:10:11,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:11,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:10:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:10:11,807 INFO L87 Difference]: Start difference. First operand has 49 states, 48 states have (on average 3.4375) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 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 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:11,851 INFO L93 Difference]: Finished difference Result 94 states and 326 transitions. [2021-08-06 15:10:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:10:11,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 15:10:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:11,864 INFO L225 Difference]: With dead ends: 94 [2021-08-06 15:10:11,864 INFO L226 Difference]: Without dead ends: 89 [2021-08-06 15:10:11,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:10:11,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-06 15:10:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-08-06 15:10:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 3.5454545454545454) internal successors, (312), 88 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 312 transitions. [2021-08-06 15:10:11,917 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 312 transitions. Word has length 15 [2021-08-06 15:10:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:11,920 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 312 transitions. [2021-08-06 15:10:11,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 312 transitions. [2021-08-06 15:10:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 15:10:11,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:11,924 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:11,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:10:11,925 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:11,927 INFO L82 PathProgramCache]: Analyzing trace with hash 261214271, now seen corresponding path program 1 times [2021-08-06 15:10:11,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:11,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132488535] [2021-08-06 15:10:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:11,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:12,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:12,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132488535] [2021-08-06 15:10:12,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132488535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:12,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333481095] [2021-08-06 15:10:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:12,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:12,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:12,038 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) [2021-08-06 15:10:12,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 15:10:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:12,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 15:10:12,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:12,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333481095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:12,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:12,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-06 15:10:12,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478008787] [2021-08-06 15:10:12,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:10:12,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:10:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:10:12,454 INFO L87 Difference]: Start difference. First operand 89 states and 312 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2021-08-06 15:10:12,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:12,492 INFO L93 Difference]: Finished difference Result 120 states and 425 transitions. [2021-08-06 15:10:12,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:10:12,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 16 [2021-08-06 15:10:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:12,497 INFO L225 Difference]: With dead ends: 120 [2021-08-06 15:10:12,497 INFO L226 Difference]: Without dead ends: 106 [2021-08-06 15:10:12,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:10:12,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-06 15:10:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-08-06 15:10:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 3.5542168674698793) internal successors, (295), 83 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 295 transitions. [2021-08-06 15:10:12,520 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 295 transitions. Word has length 16 [2021-08-06 15:10:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:12,520 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 295 transitions. [2021-08-06 15:10:12,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2021-08-06 15:10:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 295 transitions. [2021-08-06 15:10:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 15:10:12,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:12,522 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:12,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:12,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:12,738 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:12,738 INFO L82 PathProgramCache]: Analyzing trace with hash 758068569, now seen corresponding path program 1 times [2021-08-06 15:10:12,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:12,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555377216] [2021-08-06 15:10:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:12,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:12,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:12,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555377216] [2021-08-06 15:10:12,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555377216] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:10:12,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:10:12,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 15:10:12,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149567695] [2021-08-06 15:10:12,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:10:12,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:12,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:10:12,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:10:12,781 INFO L87 Difference]: Start difference. First operand 84 states and 295 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:12,789 INFO L93 Difference]: Finished difference Result 129 states and 418 transitions. [2021-08-06 15:10:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:10:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 15:10:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:12,791 INFO L225 Difference]: With dead ends: 129 [2021-08-06 15:10:12,791 INFO L226 Difference]: Without dead ends: 121 [2021-08-06 15:10:12,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:10:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-06 15:10:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-08-06 15:10:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 3.4742268041237114) internal successors, (337), 97 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 337 transitions. [2021-08-06 15:10:12,798 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 337 transitions. Word has length 16 [2021-08-06 15:10:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:12,798 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 337 transitions. [2021-08-06 15:10:12,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 337 transitions. [2021-08-06 15:10:12,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 15:10:12,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:12,800 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:12,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 15:10:12,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:12,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:12,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1696560475, now seen corresponding path program 1 times [2021-08-06 15:10:12,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:12,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621207830] [2021-08-06 15:10:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:12,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:12,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:12,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621207830] [2021-08-06 15:10:12,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621207830] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:10:12,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:10:12,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 15:10:12,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785048113] [2021-08-06 15:10:12,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:10:12,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:10:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:10:12,839 INFO L87 Difference]: Start difference. First operand 98 states and 337 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:12,854 INFO L93 Difference]: Finished difference Result 76 states and 237 transitions. [2021-08-06 15:10:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:10:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 15:10:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:12,856 INFO L225 Difference]: With dead ends: 76 [2021-08-06 15:10:12,856 INFO L226 Difference]: Without dead ends: 64 [2021-08-06 15:10:12,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:10:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-06 15:10:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-06 15:10:12,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 63 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 208 transitions. [2021-08-06 15:10:12,862 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 208 transitions. Word has length 16 [2021-08-06 15:10:12,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:12,863 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 208 transitions. [2021-08-06 15:10:12,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:12,864 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 208 transitions. [2021-08-06 15:10:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 15:10:12,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:12,865 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:12,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 15:10:12,866 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:12,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:12,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1156129383, now seen corresponding path program 1 times [2021-08-06 15:10:12,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:12,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872287984] [2021-08-06 15:10:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:12,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:12,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:12,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872287984] [2021-08-06 15:10:12,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872287984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:12,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883038078] [2021-08-06 15:10:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:12,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:12,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:12,933 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) [2021-08-06 15:10:12,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 15:10:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 15:10:12,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:13,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883038078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:13,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:13,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-06 15:10:13,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863375354] [2021-08-06 15:10:13,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:10:13,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:13,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:10:13,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:10:13,230 INFO L87 Difference]: Start difference. First operand 64 states and 208 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:13,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:13,250 INFO L93 Difference]: Finished difference Result 115 states and 389 transitions. [2021-08-06 15:10:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:10:13,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 15:10:13,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:13,252 INFO L225 Difference]: With dead ends: 115 [2021-08-06 15:10:13,252 INFO L226 Difference]: Without dead ends: 108 [2021-08-06 15:10:13,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:10:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-06 15:10:13,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-08-06 15:10:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 3.4299065420560746) internal successors, (367), 107 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 367 transitions. [2021-08-06 15:10:13,266 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 367 transitions. Word has length 16 [2021-08-06 15:10:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:13,267 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 367 transitions. [2021-08-06 15:10:13,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 367 transitions. [2021-08-06 15:10:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 15:10:13,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:13,270 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:13,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:13,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:13,494 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:13,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1480829340, now seen corresponding path program 1 times [2021-08-06 15:10:13,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:13,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518692210] [2021-08-06 15:10:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:13,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:13,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:13,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518692210] [2021-08-06 15:10:13,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518692210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:13,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011471759] [2021-08-06 15:10:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:13,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:13,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:13,568 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) [2021-08-06 15:10:13,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 15:10:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:13,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 15:10:13,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:10:13,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011471759] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:10:13,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 15:10:13,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-08-06 15:10:13,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633694665] [2021-08-06 15:10:13,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:10:13,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:13,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:10:13,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:10:13,778 INFO L87 Difference]: Start difference. First operand 108 states and 367 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:13,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:13,787 INFO L93 Difference]: Finished difference Result 57 states and 166 transitions. [2021-08-06 15:10:13,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:10:13,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 15:10:13,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:13,789 INFO L225 Difference]: With dead ends: 57 [2021-08-06 15:10:13,789 INFO L226 Difference]: Without dead ends: 54 [2021-08-06 15:10:13,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:10:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-06 15:10:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-06 15:10:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:13,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 161 transitions. [2021-08-06 15:10:13,794 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 161 transitions. Word has length 17 [2021-08-06 15:10:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:13,794 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 161 transitions. [2021-08-06 15:10:13,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 161 transitions. [2021-08-06 15:10:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 15:10:13,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:13,795 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:13,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:14,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:14,011 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:14,011 INFO L82 PathProgramCache]: Analyzing trace with hash -452888174, now seen corresponding path program 2 times [2021-08-06 15:10:14,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:14,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797819981] [2021-08-06 15:10:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:14,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:14,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:14,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797819981] [2021-08-06 15:10:14,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797819981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:14,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230889143] [2021-08-06 15:10:14,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:10:14,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:14,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:14,095 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) [2021-08-06 15:10:14,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 15:10:14,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:10:14,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:14,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:10:14,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:14,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230889143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:14,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:14,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-06 15:10:14,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762251413] [2021-08-06 15:10:14,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:10:14,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:14,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:10:14,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:10:14,453 INFO L87 Difference]: Start difference. First operand 54 states and 161 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:14,492 INFO L93 Difference]: Finished difference Result 93 states and 298 transitions. [2021-08-06 15:10:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:10:14,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 15:10:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:14,494 INFO L225 Difference]: With dead ends: 93 [2021-08-06 15:10:14,494 INFO L226 Difference]: Without dead ends: 88 [2021-08-06 15:10:14,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:10:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-06 15:10:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-08-06 15:10:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 3.2906976744186047) internal successors, (283), 86 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 283 transitions. [2021-08-06 15:10:14,497 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 283 transitions. Word has length 17 [2021-08-06 15:10:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:14,497 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 283 transitions. [2021-08-06 15:10:14,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 283 transitions. [2021-08-06 15:10:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:10:14,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:14,498 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:14,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:14,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:14,722 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:14,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1154074671, now seen corresponding path program 3 times [2021-08-06 15:10:14,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:14,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140884265] [2021-08-06 15:10:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:14,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:14,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:14,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140884265] [2021-08-06 15:10:14,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140884265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:14,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661912231] [2021-08-06 15:10:14,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:10:14,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:14,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:14,793 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) [2021-08-06 15:10:14,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 15:10:14,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:10:14,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:14,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:10:14,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:15,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661912231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:15,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:15,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-06 15:10:15,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637057932] [2021-08-06 15:10:15,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:10:15,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:10:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:10:15,486 INFO L87 Difference]: Start difference. First operand 87 states and 283 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:15,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:15,540 INFO L93 Difference]: Finished difference Result 113 states and 341 transitions. [2021-08-06 15:10:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:10:15,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 15:10:15,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:15,541 INFO L225 Difference]: With dead ends: 113 [2021-08-06 15:10:15,541 INFO L226 Difference]: Without dead ends: 109 [2021-08-06 15:10:15,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:10:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-06 15:10:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2021-08-06 15:10:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 3.2) internal successors, (288), 90 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 288 transitions. [2021-08-06 15:10:15,544 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 288 transitions. Word has length 18 [2021-08-06 15:10:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:15,545 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 288 transitions. [2021-08-06 15:10:15,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 288 transitions. [2021-08-06 15:10:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:10:15,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:15,545 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:15,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:15,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:15,769 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1687697523, now seen corresponding path program 4 times [2021-08-06 15:10:15,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:15,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521818017] [2021-08-06 15:10:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:15,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:15,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:15,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521818017] [2021-08-06 15:10:15,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521818017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:15,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771723629] [2021-08-06 15:10:15,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:10:15,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:15,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:15,873 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) [2021-08-06 15:10:15,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 15:10:15,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:10:15,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:15,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:10:16,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:16,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771723629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:16,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:16,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 15:10:16,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592943119] [2021-08-06 15:10:16,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:10:16,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:10:16,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:10:16,295 INFO L87 Difference]: Start difference. First operand 91 states and 288 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-08-06 15:10:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:16,342 INFO L93 Difference]: Finished difference Result 122 states and 401 transitions. [2021-08-06 15:10:16,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:10:16,342 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 15:10:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:16,343 INFO L225 Difference]: With dead ends: 122 [2021-08-06 15:10:16,343 INFO L226 Difference]: Without dead ends: 117 [2021-08-06 15:10:16,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:10:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-06 15:10:16,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2021-08-06 15:10:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 3.3944954128440368) internal successors, (370), 109 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 370 transitions. [2021-08-06 15:10:16,347 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 370 transitions. Word has length 18 [2021-08-06 15:10:16,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:16,347 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 370 transitions. [2021-08-06 15:10:16,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-08-06 15:10:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 370 transitions. [2021-08-06 15:10:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:10:16,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:16,348 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:16,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:16,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:16,565 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:16,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:16,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2059011589, now seen corresponding path program 1 times [2021-08-06 15:10:16,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:16,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105424732] [2021-08-06 15:10:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:16,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:16,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:16,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105424732] [2021-08-06 15:10:16,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105424732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:16,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947434469] [2021-08-06 15:10:16,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:16,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:16,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:16,661 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) [2021-08-06 15:10:16,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 15:10:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:10:16,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:17,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947434469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:17,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:17,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-08-06 15:10:17,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322984401] [2021-08-06 15:10:17,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:10:17,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:17,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:10:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:10:17,307 INFO L87 Difference]: Start difference. First operand 110 states and 370 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-08-06 15:10:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:17,439 INFO L93 Difference]: Finished difference Result 211 states and 713 transitions. [2021-08-06 15:10:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:10:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 18 [2021-08-06 15:10:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:17,441 INFO L225 Difference]: With dead ends: 211 [2021-08-06 15:10:17,441 INFO L226 Difference]: Without dead ends: 196 [2021-08-06 15:10:17,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:10:17,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-06 15:10:17,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 153. [2021-08-06 15:10:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.6973684210526314) internal successors, (562), 152 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 562 transitions. [2021-08-06 15:10:17,451 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 562 transitions. Word has length 18 [2021-08-06 15:10:17,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:17,451 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 562 transitions. [2021-08-06 15:10:17,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-08-06 15:10:17,452 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 562 transitions. [2021-08-06 15:10:17,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:10:17,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:17,452 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:17,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:17,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:17,669 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:17,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1536312159, now seen corresponding path program 1 times [2021-08-06 15:10:17,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:17,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767380099] [2021-08-06 15:10:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:17,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:17,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:17,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767380099] [2021-08-06 15:10:17,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767380099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:17,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419923490] [2021-08-06 15:10:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:17,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:17,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:17,733 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) [2021-08-06 15:10:17,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 15:10:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:17,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:10:17,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:18,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419923490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:18,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:18,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-08-06 15:10:18,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637208536] [2021-08-06 15:10:18,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:10:18,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:18,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:10:18,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:10:18,309 INFO L87 Difference]: Start difference. First operand 153 states and 562 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-08-06 15:10:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:18,370 INFO L93 Difference]: Finished difference Result 242 states and 888 transitions. [2021-08-06 15:10:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:10:18,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 18 [2021-08-06 15:10:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:18,373 INFO L225 Difference]: With dead ends: 242 [2021-08-06 15:10:18,373 INFO L226 Difference]: Without dead ends: 229 [2021-08-06 15:10:18,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:10:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-06 15:10:18,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 152. [2021-08-06 15:10:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.966887417218543) internal successors, (599), 151 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 599 transitions. [2021-08-06 15:10:18,379 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 599 transitions. Word has length 18 [2021-08-06 15:10:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:18,379 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 599 transitions. [2021-08-06 15:10:18,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-08-06 15:10:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 599 transitions. [2021-08-06 15:10:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 15:10:18,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:18,380 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:18,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:18,600 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,SelfDestructingSolverStorable10 [2021-08-06 15:10:18,601 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:18,601 INFO L82 PathProgramCache]: Analyzing trace with hash -778458826, now seen corresponding path program 5 times [2021-08-06 15:10:18,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:18,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800500263] [2021-08-06 15:10:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:18,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:18,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:18,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800500263] [2021-08-06 15:10:18,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800500263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:18,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050137171] [2021-08-06 15:10:18,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:10:18,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:18,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:18,717 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) [2021-08-06 15:10:18,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 15:10:18,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:10:18,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:18,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:10:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:19,200 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:19,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050137171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:19,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:19,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 15:10:19,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96561802] [2021-08-06 15:10:19,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:10:19,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:19,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:10:19,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:10:19,313 INFO L87 Difference]: Start difference. First operand 152 states and 599 transitions. Second operand has 10 states, 10 states have (on average 3.4) 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) [2021-08-06 15:10:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:19,400 INFO L93 Difference]: Finished difference Result 283 states and 1056 transitions. [2021-08-06 15:10:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:10:19,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) 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 19 [2021-08-06 15:10:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:19,403 INFO L225 Difference]: With dead ends: 283 [2021-08-06 15:10:19,403 INFO L226 Difference]: Without dead ends: 275 [2021-08-06 15:10:19,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:10:19,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-06 15:10:19,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 204. [2021-08-06 15:10:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 4.029556650246305) internal successors, (818), 203 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 818 transitions. [2021-08-06 15:10:19,411 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 818 transitions. Word has length 19 [2021-08-06 15:10:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:19,412 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 818 transitions. [2021-08-06 15:10:19,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) 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) [2021-08-06 15:10:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 818 transitions. [2021-08-06 15:10:19,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 15:10:19,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:19,413 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:19,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:19,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:19,639 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:19,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1312081678, now seen corresponding path program 6 times [2021-08-06 15:10:19,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:19,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010703156] [2021-08-06 15:10:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:19,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:19,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:19,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010703156] [2021-08-06 15:10:19,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010703156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:19,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558433917] [2021-08-06 15:10:19,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:10:19,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:19,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:19,749 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) [2021-08-06 15:10:19,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 15:10:19,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:10:19,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:19,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:10:19,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:20,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558433917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:20,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:20,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 15:10:20,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737703164] [2021-08-06 15:10:20,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:10:20,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:20,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:10:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:10:20,376 INFO L87 Difference]: Start difference. First operand 204 states and 818 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:20,447 INFO L93 Difference]: Finished difference Result 251 states and 973 transitions. [2021-08-06 15:10:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:10:20,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 15:10:20,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:20,450 INFO L225 Difference]: With dead ends: 251 [2021-08-06 15:10:20,450 INFO L226 Difference]: Without dead ends: 246 [2021-08-06 15:10:20,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:10:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-08-06 15:10:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 214. [2021-08-06 15:10:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 4.065727699530516) internal successors, (866), 213 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 866 transitions. [2021-08-06 15:10:20,458 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 866 transitions. Word has length 19 [2021-08-06 15:10:20,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:20,458 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 866 transitions. [2021-08-06 15:10:20,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 866 transitions. [2021-08-06 15:10:20,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:10:20,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:20,460 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:20,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:20,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 15:10:20,681 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:20,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:20,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2019269519, now seen corresponding path program 7 times [2021-08-06 15:10:20,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:20,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073555991] [2021-08-06 15:10:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:20,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:20,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:20,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073555991] [2021-08-06 15:10:20,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073555991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:20,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452619795] [2021-08-06 15:10:20,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:10:20,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:20,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:20,819 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) [2021-08-06 15:10:20,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 15:10:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:21,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:10:21,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:21,445 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:21,452 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:21,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452619795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:21,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:21,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-06 15:10:21,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095771932] [2021-08-06 15:10:21,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:10:21,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:21,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:10:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:10:21,844 INFO L87 Difference]: Start difference. First operand 214 states and 866 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:21,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:21,962 INFO L93 Difference]: Finished difference Result 474 states and 1795 transitions. [2021-08-06 15:10:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:10:21,963 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 15:10:21,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:21,966 INFO L225 Difference]: With dead ends: 474 [2021-08-06 15:10:21,966 INFO L226 Difference]: Without dead ends: 462 [2021-08-06 15:10:21,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:10:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-06 15:10:21,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 231. [2021-08-06 15:10:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 4.160869565217391) internal successors, (957), 230 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 957 transitions. [2021-08-06 15:10:21,976 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 957 transitions. Word has length 20 [2021-08-06 15:10:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:21,977 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 957 transitions. [2021-08-06 15:10:21,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:21,977 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 957 transitions. [2021-08-06 15:10:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:10:21,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:21,978 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:22,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:22,192 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,SelfDestructingSolverStorable13 [2021-08-06 15:10:22,193 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1742074925, now seen corresponding path program 8 times [2021-08-06 15:10:22,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:22,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173581298] [2021-08-06 15:10:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:22,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:22,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:22,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173581298] [2021-08-06 15:10:22,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173581298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:22,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590357737] [2021-08-06 15:10:22,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:10:22,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:22,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:22,377 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) [2021-08-06 15:10:22,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 15:10:22,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:10:22,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:22,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:10:22,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:23,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590357737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:23,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:23,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-06 15:10:23,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421109462] [2021-08-06 15:10:23,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:10:23,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:10:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:10:23,073 INFO L87 Difference]: Start difference. First operand 231 states and 957 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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) [2021-08-06 15:10:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:23,160 INFO L93 Difference]: Finished difference Result 235 states and 877 transitions. [2021-08-06 15:10:23,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:10:23,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 15:10:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:23,162 INFO L225 Difference]: With dead ends: 235 [2021-08-06 15:10:23,162 INFO L226 Difference]: Without dead ends: 225 [2021-08-06 15:10:23,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:10:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-06 15:10:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2021-08-06 15:10:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 3.915) internal successors, (783), 200 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 783 transitions. [2021-08-06 15:10:23,171 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 783 transitions. Word has length 20 [2021-08-06 15:10:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:23,172 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 783 transitions. [2021-08-06 15:10:23,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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) [2021-08-06 15:10:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 783 transitions. [2021-08-06 15:10:23,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:10:23,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:23,173 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:23,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:23,396 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,SelfDestructingSolverStorable14 [2021-08-06 15:10:23,397 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash 559897761, now seen corresponding path program 2 times [2021-08-06 15:10:23,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:23,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721784356] [2021-08-06 15:10:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:23,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:23,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:23,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721784356] [2021-08-06 15:10:23,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721784356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:23,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707344767] [2021-08-06 15:10:23,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:10:23,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:23,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:23,493 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) [2021-08-06 15:10:23,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 15:10:23,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:10:23,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:23,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 15:10:23,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:24,251 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:10:24,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707344767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:24,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:24,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 15:10:24,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573642488] [2021-08-06 15:10:24,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:10:24,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:10:24,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:10:24,514 INFO L87 Difference]: Start difference. First operand 201 states and 783 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-08-06 15:10:24,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:24,704 INFO L93 Difference]: Finished difference Result 359 states and 1319 transitions. [2021-08-06 15:10:24,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:10:24,705 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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 20 [2021-08-06 15:10:24,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:24,707 INFO L225 Difference]: With dead ends: 359 [2021-08-06 15:10:24,707 INFO L226 Difference]: Without dead ends: 344 [2021-08-06 15:10:24,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:10:24,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-06 15:10:24,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 234. [2021-08-06 15:10:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.9914163090128754) internal successors, (930), 233 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:24,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 930 transitions. [2021-08-06 15:10:24,716 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 930 transitions. Word has length 20 [2021-08-06 15:10:24,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:24,716 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 930 transitions. [2021-08-06 15:10:24,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) 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) [2021-08-06 15:10:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 930 transitions. [2021-08-06 15:10:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:10:24,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:24,718 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:24,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:24,934 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,SelfDestructingSolverStorable15 [2021-08-06 15:10:24,934 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:24,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:24,935 INFO L82 PathProgramCache]: Analyzing trace with hash 190706723, now seen corresponding path program 2 times [2021-08-06 15:10:24,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:24,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973365474] [2021-08-06 15:10:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:24,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:25,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:25,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973365474] [2021-08-06 15:10:25,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973365474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:25,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756821053] [2021-08-06 15:10:25,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:10:25,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:25,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:25,041 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) [2021-08-06 15:10:25,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 15:10:25,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:10:25,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:25,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 15:10:25,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:26,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756821053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:26,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:26,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-06 15:10:26,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073959164] [2021-08-06 15:10:26,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:10:26,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:10:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:10:26,066 INFO L87 Difference]: Start difference. First operand 234 states and 930 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-08-06 15:10:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:26,318 INFO L93 Difference]: Finished difference Result 421 states and 1573 transitions. [2021-08-06 15:10:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:10:26,318 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 15:10:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:26,321 INFO L225 Difference]: With dead ends: 421 [2021-08-06 15:10:26,321 INFO L226 Difference]: Without dead ends: 412 [2021-08-06 15:10:26,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:10:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-08-06 15:10:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 260. [2021-08-06 15:10:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 4.096525096525096) internal successors, (1061), 259 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 1061 transitions. [2021-08-06 15:10:26,331 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 1061 transitions. Word has length 20 [2021-08-06 15:10:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:26,331 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 1061 transitions. [2021-08-06 15:10:26,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-08-06 15:10:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 1061 transitions. [2021-08-06 15:10:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:10:26,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:26,333 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:26,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:26,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:26,551 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:26,551 INFO L82 PathProgramCache]: Analyzing trace with hash 56649189, now seen corresponding path program 3 times [2021-08-06 15:10:26,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:26,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012964625] [2021-08-06 15:10:26,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:26,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:26,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:26,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012964625] [2021-08-06 15:10:26,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012964625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:26,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801449833] [2021-08-06 15:10:26,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:10:26,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:26,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:26,702 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) [2021-08-06 15:10:26,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 15:10:27,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:10:27,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:27,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:10:27,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:27,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801449833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:27,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:27,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:10:27,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671904653] [2021-08-06 15:10:27,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:10:27,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:27,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:10:27,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:10:27,560 INFO L87 Difference]: Start difference. First operand 260 states and 1061 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-08-06 15:10:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:27,669 INFO L93 Difference]: Finished difference Result 327 states and 1263 transitions. [2021-08-06 15:10:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:10:27,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 15:10:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:27,672 INFO L225 Difference]: With dead ends: 327 [2021-08-06 15:10:27,672 INFO L226 Difference]: Without dead ends: 318 [2021-08-06 15:10:27,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:10:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-08-06 15:10:27,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 270. [2021-08-06 15:10:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 4.115241635687732) internal successors, (1107), 269 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 1107 transitions. [2021-08-06 15:10:27,680 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 1107 transitions. Word has length 20 [2021-08-06 15:10:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:27,681 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 1107 transitions. [2021-08-06 15:10:27,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-08-06 15:10:27,681 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 1107 transitions. [2021-08-06 15:10:27,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 15:10:27,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:27,682 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:27,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:27,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 15:10:27,905 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:27,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:27,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1852142980, now seen corresponding path program 3 times [2021-08-06 15:10:27,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:27,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724701220] [2021-08-06 15:10:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:27,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:28,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:28,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724701220] [2021-08-06 15:10:28,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724701220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:28,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457713775] [2021-08-06 15:10:28,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:10:28,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:28,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:28,066 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) [2021-08-06 15:10:28,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 15:10:28,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:10:28,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:28,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:10:28,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:28,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457713775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:28,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:28,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 15:10:28,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685668867] [2021-08-06 15:10:28,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:10:28,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:28,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:10:28,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:10:28,988 INFO L87 Difference]: Start difference. First operand 270 states and 1107 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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) [2021-08-06 15:10:29,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:29,209 INFO L93 Difference]: Finished difference Result 336 states and 1278 transitions. [2021-08-06 15:10:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:10:29,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 21 [2021-08-06 15:10:29,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:29,212 INFO L225 Difference]: With dead ends: 336 [2021-08-06 15:10:29,212 INFO L226 Difference]: Without dead ends: 332 [2021-08-06 15:10:29,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:10:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-08-06 15:10:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 276. [2021-08-06 15:10:29,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 4.094545454545455) internal successors, (1126), 275 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1126 transitions. [2021-08-06 15:10:29,221 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1126 transitions. Word has length 21 [2021-08-06 15:10:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:29,221 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 1126 transitions. [2021-08-06 15:10:29,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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) [2021-08-06 15:10:29,221 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1126 transitions. [2021-08-06 15:10:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 15:10:29,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:29,222 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:29,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:29,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:29,437 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:29,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:29,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1380782756, now seen corresponding path program 4 times [2021-08-06 15:10:29,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:29,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233301396] [2021-08-06 15:10:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:29,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:29,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:29,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233301396] [2021-08-06 15:10:29,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233301396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:29,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112329116] [2021-08-06 15:10:29,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:10:29,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:29,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:29,538 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) [2021-08-06 15:10:29,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 15:10:29,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:10:29,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:10:29,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:30,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112329116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:30,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:30,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 15:10:30,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914415037] [2021-08-06 15:10:30,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:10:30,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:10:30,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:10:30,554 INFO L87 Difference]: Start difference. First operand 276 states and 1126 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-08-06 15:10:30,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:30,712 INFO L93 Difference]: Finished difference Result 717 states and 2807 transitions. [2021-08-06 15:10:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:10:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 21 [2021-08-06 15:10:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:30,717 INFO L225 Difference]: With dead ends: 717 [2021-08-06 15:10:30,718 INFO L226 Difference]: Without dead ends: 701 [2021-08-06 15:10:30,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:10:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-08-06 15:10:30,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 453. [2021-08-06 15:10:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 4.398230088495575) internal successors, (1988), 452 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:30,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1988 transitions. [2021-08-06 15:10:30,739 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1988 transitions. Word has length 21 [2021-08-06 15:10:30,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:30,739 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1988 transitions. [2021-08-06 15:10:30,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-08-06 15:10:30,739 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1988 transitions. [2021-08-06 15:10:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 15:10:30,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:30,741 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:30,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:30,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:30,966 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:30,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:30,967 INFO L82 PathProgramCache]: Analyzing trace with hash -959015168, now seen corresponding path program 5 times [2021-08-06 15:10:30,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:30,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425408519] [2021-08-06 15:10:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:30,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:31,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:31,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425408519] [2021-08-06 15:10:31,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425408519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:31,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603344697] [2021-08-06 15:10:31,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:10:31,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:31,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:31,119 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) [2021-08-06 15:10:31,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 15:10:31,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:10:31,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:31,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:10:31,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:32,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603344697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:32,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:32,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-06 15:10:32,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358568193] [2021-08-06 15:10:32,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:10:32,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:32,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:10:32,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:10:32,026 INFO L87 Difference]: Start difference. First operand 453 states and 1988 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 15:10:32,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:32,300 INFO L93 Difference]: Finished difference Result 532 states and 2224 transitions. [2021-08-06 15:10:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:10:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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 21 [2021-08-06 15:10:32,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:32,304 INFO L225 Difference]: With dead ends: 532 [2021-08-06 15:10:32,304 INFO L226 Difference]: Without dead ends: 522 [2021-08-06 15:10:32,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:10:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-08-06 15:10:32,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 472. [2021-08-06 15:10:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 4.384288747346072) internal successors, (2065), 471 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 2065 transitions. [2021-08-06 15:10:32,319 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 2065 transitions. Word has length 21 [2021-08-06 15:10:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:32,319 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 2065 transitions. [2021-08-06 15:10:32,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) 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) [2021-08-06 15:10:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 2065 transitions. [2021-08-06 15:10:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 15:10:32,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:32,322 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:32,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:32,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:32,545 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:32,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:32,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1241599014, now seen corresponding path program 6 times [2021-08-06 15:10:32,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:32,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409702752] [2021-08-06 15:10:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:32,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:32,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:32,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409702752] [2021-08-06 15:10:32,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409702752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:32,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158397480] [2021-08-06 15:10:32,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:10:32,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:32,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:32,655 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) [2021-08-06 15:10:32,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 15:10:33,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:10:33,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:33,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:10:33,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:33,518 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:33,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158397480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:33,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:33,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-06 15:10:33,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680124800] [2021-08-06 15:10:33,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:10:33,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:10:33,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:10:33,638 INFO L87 Difference]: Start difference. First operand 472 states and 2065 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:33,821 INFO L93 Difference]: Finished difference Result 542 states and 2267 transitions. [2021-08-06 15:10:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:10:33,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 15:10:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:33,825 INFO L225 Difference]: With dead ends: 542 [2021-08-06 15:10:33,825 INFO L226 Difference]: Without dead ends: 533 [2021-08-06 15:10:33,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:10:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-08-06 15:10:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 476. [2021-08-06 15:10:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 4.391578947368421) internal successors, (2086), 475 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 2086 transitions. [2021-08-06 15:10:33,845 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 2086 transitions. Word has length 21 [2021-08-06 15:10:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:33,845 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 2086 transitions. [2021-08-06 15:10:33,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 2086 transitions. [2021-08-06 15:10:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 15:10:33,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:33,849 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:33,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:34,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:34,065 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash -700849730, now seen corresponding path program 7 times [2021-08-06 15:10:34,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:34,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088798792] [2021-08-06 15:10:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:34,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:34,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:34,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088798792] [2021-08-06 15:10:34,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088798792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:34,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314811326] [2021-08-06 15:10:34,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:10:34,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:34,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:34,172 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) [2021-08-06 15:10:34,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 15:10:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:34,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:10:34,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:35,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314811326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:35,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:35,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-06 15:10:35,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322089264] [2021-08-06 15:10:35,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:10:35,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:35,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:10:35,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:10:35,113 INFO L87 Difference]: Start difference. First operand 476 states and 2086 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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) [2021-08-06 15:10:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:35,265 INFO L93 Difference]: Finished difference Result 541 states and 2261 transitions. [2021-08-06 15:10:35,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:10:35,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 21 [2021-08-06 15:10:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:35,268 INFO L225 Difference]: With dead ends: 541 [2021-08-06 15:10:35,268 INFO L226 Difference]: Without dead ends: 532 [2021-08-06 15:10:35,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:10:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-06 15:10:35,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 485. [2021-08-06 15:10:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 4.37603305785124) internal successors, (2118), 484 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 2118 transitions. [2021-08-06 15:10:35,283 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 2118 transitions. Word has length 21 [2021-08-06 15:10:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:35,283 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 2118 transitions. [2021-08-06 15:10:35,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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) [2021-08-06 15:10:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 2118 transitions. [2021-08-06 15:10:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 15:10:35,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:35,285 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:35,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:35,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-06 15:10:35,509 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1203866832, now seen corresponding path program 1 times [2021-08-06 15:10:35,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:35,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045382056] [2021-08-06 15:10:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:35,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:10:35,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:35,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045382056] [2021-08-06 15:10:35,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045382056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:35,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527959967] [2021-08-06 15:10:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:35,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:35,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:35,593 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) [2021-08-06 15:10:35,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 15:10:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:36,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:10:36,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:10:36,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527959967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:36,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:36,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-06 15:10:36,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400288740] [2021-08-06 15:10:36,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:10:36,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:36,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:10:36,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:10:36,759 INFO L87 Difference]: Start difference. First operand 485 states and 2118 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-08-06 15:10:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:36,942 INFO L93 Difference]: Finished difference Result 484 states and 2051 transitions. [2021-08-06 15:10:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:10:36,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 21 [2021-08-06 15:10:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:36,944 INFO L225 Difference]: With dead ends: 484 [2021-08-06 15:10:36,944 INFO L226 Difference]: Without dead ends: 460 [2021-08-06 15:10:36,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:10:36,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-08-06 15:10:36,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2021-08-06 15:10:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 4.355119825708061) internal successors, (1999), 459 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:36,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1999 transitions. [2021-08-06 15:10:36,957 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1999 transitions. Word has length 21 [2021-08-06 15:10:36,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:36,957 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1999 transitions. [2021-08-06 15:10:36,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-08-06 15:10:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1999 transitions. [2021-08-06 15:10:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:10:36,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:36,959 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:36,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:37,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 15:10:37,179 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:37,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:37,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1303153477, now seen corresponding path program 4 times [2021-08-06 15:10:37,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:37,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987442195] [2021-08-06 15:10:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:37,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:37,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:37,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987442195] [2021-08-06 15:10:37,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987442195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:37,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349666463] [2021-08-06 15:10:37,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:10:37,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:37,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:37,325 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) [2021-08-06 15:10:37,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 15:10:37,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:10:37,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:37,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:10:37,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:38,196 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:38,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349666463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:38,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:38,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-06 15:10:38,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230858022] [2021-08-06 15:10:38,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:10:38,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:10:38,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:10:38,636 INFO L87 Difference]: Start difference. First operand 460 states and 1999 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) 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) [2021-08-06 15:10:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:38,859 INFO L93 Difference]: Finished difference Result 1058 states and 4269 transitions. [2021-08-06 15:10:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:10:38,859 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) 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 22 [2021-08-06 15:10:38,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:38,865 INFO L225 Difference]: With dead ends: 1058 [2021-08-06 15:10:38,865 INFO L226 Difference]: Without dead ends: 1014 [2021-08-06 15:10:38,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:10:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-08-06 15:10:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 713. [2021-08-06 15:10:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 4.455056179775281) internal successors, (3172), 712 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 3172 transitions. [2021-08-06 15:10:38,892 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 3172 transitions. Word has length 22 [2021-08-06 15:10:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:38,892 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 3172 transitions. [2021-08-06 15:10:38,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) 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) [2021-08-06 15:10:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 3172 transitions. [2021-08-06 15:10:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:10:38,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:38,895 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:38,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:39,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:39,108 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:39,108 INFO L82 PathProgramCache]: Analyzing trace with hash -707031167, now seen corresponding path program 5 times [2021-08-06 15:10:39,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:39,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786972805] [2021-08-06 15:10:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:39,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:39,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:39,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786972805] [2021-08-06 15:10:39,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786972805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:39,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839845917] [2021-08-06 15:10:39,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:10:39,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:39,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:39,337 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) [2021-08-06 15:10:39,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 15:10:39,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:10:39,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:39,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:10:39,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:40,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839845917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:40,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:40,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 15:10:40,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905719151] [2021-08-06 15:10:40,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:10:40,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:40,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:10:40,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:10:40,581 INFO L87 Difference]: Start difference. First operand 713 states and 3172 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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) [2021-08-06 15:10:40,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:40,866 INFO L93 Difference]: Finished difference Result 753 states and 3276 transitions. [2021-08-06 15:10:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:10:40,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:10:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:40,871 INFO L225 Difference]: With dead ends: 753 [2021-08-06 15:10:40,871 INFO L226 Difference]: Without dead ends: 744 [2021-08-06 15:10:40,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 408.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:10:40,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-08-06 15:10:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 720. [2021-08-06 15:10:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 4.45201668984701) internal successors, (3201), 719 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 3201 transitions. [2021-08-06 15:10:40,891 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 3201 transitions. Word has length 22 [2021-08-06 15:10:40,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:40,891 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 3201 transitions. [2021-08-06 15:10:40,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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) [2021-08-06 15:10:40,891 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 3201 transitions. [2021-08-06 15:10:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:10:40,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:40,893 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:40,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-06 15:10:41,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:41,117 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:41,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1493360545, now seen corresponding path program 8 times [2021-08-06 15:10:41,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:41,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974264299] [2021-08-06 15:10:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:41,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:41,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:41,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974264299] [2021-08-06 15:10:41,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974264299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:41,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315820304] [2021-08-06 15:10:41,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:10:41,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:41,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:41,253 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) [2021-08-06 15:10:41,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 15:10:41,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:10:41,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:41,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 15:10:41,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:42,353 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:42,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315820304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:42,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:42,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 15:10:42,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047750479] [2021-08-06 15:10:42,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:10:42,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:42,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:10:42,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:10:42,731 INFO L87 Difference]: Start difference. First operand 720 states and 3201 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:43,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:43,016 INFO L93 Difference]: Finished difference Result 1382 states and 5758 transitions. [2021-08-06 15:10:43,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:10:43,016 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:10:43,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:43,025 INFO L225 Difference]: With dead ends: 1382 [2021-08-06 15:10:43,025 INFO L226 Difference]: Without dead ends: 1338 [2021-08-06 15:10:43,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 349.3ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:10:43,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-08-06 15:10:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 781. [2021-08-06 15:10:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 4.448717948717949) internal successors, (3470), 780 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 3470 transitions. [2021-08-06 15:10:43,049 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 3470 transitions. Word has length 22 [2021-08-06 15:10:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:43,049 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 3470 transitions. [2021-08-06 15:10:43,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:43,050 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 3470 transitions. [2021-08-06 15:10:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:10:43,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:43,052 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:43,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:43,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 15:10:43,265 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:43,266 INFO L82 PathProgramCache]: Analyzing trace with hash -2121673725, now seen corresponding path program 9 times [2021-08-06 15:10:43,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:43,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803933679] [2021-08-06 15:10:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:43,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:43,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:43,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803933679] [2021-08-06 15:10:43,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803933679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:43,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167379157] [2021-08-06 15:10:43,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:10:43,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:43,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:43,512 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) [2021-08-06 15:10:43,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 15:10:44,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:10:44,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:44,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:10:44,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:44,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167379157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:44,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:44,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 15:10:44,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385225510] [2021-08-06 15:10:44,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:10:44,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:44,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:10:44,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:10:44,725 INFO L87 Difference]: Start difference. First operand 781 states and 3470 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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) [2021-08-06 15:10:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:44,845 INFO L93 Difference]: Finished difference Result 814 states and 3561 transitions. [2021-08-06 15:10:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:10:44,846 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:10:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:44,849 INFO L225 Difference]: With dead ends: 814 [2021-08-06 15:10:44,849 INFO L226 Difference]: Without dead ends: 805 [2021-08-06 15:10:44,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:10:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-08-06 15:10:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 790. [2021-08-06 15:10:44,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 4.442332065906211) internal successors, (3505), 789 states have internal predecessors, (3505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 3505 transitions. [2021-08-06 15:10:44,870 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 3505 transitions. Word has length 22 [2021-08-06 15:10:44,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:44,870 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 3505 transitions. [2021-08-06 15:10:44,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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) [2021-08-06 15:10:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 3505 transitions. [2021-08-06 15:10:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:10:44,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:44,873 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:44,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:45,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 15:10:45,089 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:45,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1462379653, now seen corresponding path program 10 times [2021-08-06 15:10:45,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:45,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264405569] [2021-08-06 15:10:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:45,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:45,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:45,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264405569] [2021-08-06 15:10:45,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264405569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:45,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351661204] [2021-08-06 15:10:45,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:10:45,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:45,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:45,238 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) [2021-08-06 15:10:45,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 15:10:45,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:10:45,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:45,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:10:45,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:46,275 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:46,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351661204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:46,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:46,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-06 15:10:46,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394822383] [2021-08-06 15:10:46,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:10:46,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:46,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:10:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:10:46,427 INFO L87 Difference]: Start difference. First operand 790 states and 3505 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) 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) [2021-08-06 15:10:46,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:46,513 INFO L93 Difference]: Finished difference Result 1595 states and 6814 transitions. [2021-08-06 15:10:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:10:46,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) 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 22 [2021-08-06 15:10:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:46,522 INFO L225 Difference]: With dead ends: 1595 [2021-08-06 15:10:46,522 INFO L226 Difference]: Without dead ends: 1571 [2021-08-06 15:10:46,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:10:46,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-08-06 15:10:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 862. [2021-08-06 15:10:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 4.585365853658536) internal successors, (3948), 861 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 3948 transitions. [2021-08-06 15:10:46,569 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 3948 transitions. Word has length 22 [2021-08-06 15:10:46,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:46,569 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 3948 transitions. [2021-08-06 15:10:46,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) 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) [2021-08-06 15:10:46,569 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 3948 transitions. [2021-08-06 15:10:46,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:10:46,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:46,573 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:46,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:46,792 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,SelfDestructingSolverStorable28 [2021-08-06 15:10:46,793 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:46,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:46,793 INFO L82 PathProgramCache]: Analyzing trace with hash -509113753, now seen corresponding path program 11 times [2021-08-06 15:10:46,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:46,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525935771] [2021-08-06 15:10:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:46,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:10:46,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:46,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525935771] [2021-08-06 15:10:46,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525935771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:46,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558548440] [2021-08-06 15:10:46,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:10:46,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:46,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:46,927 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) [2021-08-06 15:10:46,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 15:10:47,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:10:47,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:47,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:10:47,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:48,051 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:48,168 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:49,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558548440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:49,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:49,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 15:10:49,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778591988] [2021-08-06 15:10:49,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:10:49,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:49,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:10:49,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:10:49,183 INFO L87 Difference]: Start difference. First operand 862 states and 3948 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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) [2021-08-06 15:10:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:49,456 INFO L93 Difference]: Finished difference Result 1099 states and 4780 transitions. [2021-08-06 15:10:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:10:49,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 22 [2021-08-06 15:10:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:49,461 INFO L225 Difference]: With dead ends: 1099 [2021-08-06 15:10:49,461 INFO L226 Difference]: Without dead ends: 1097 [2021-08-06 15:10:49,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:10:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-08-06 15:10:49,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 897. [2021-08-06 15:10:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 4.602678571428571) internal successors, (4124), 896 states have internal predecessors, (4124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 4124 transitions. [2021-08-06 15:10:49,487 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 4124 transitions. Word has length 22 [2021-08-06 15:10:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:49,488 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 4124 transitions. [2021-08-06 15:10:49,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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) [2021-08-06 15:10:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 4124 transitions. [2021-08-06 15:10:49,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:10:49,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:49,490 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:49,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:49,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:49,715 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1328322119, now seen corresponding path program 12 times [2021-08-06 15:10:49,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:49,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985293408] [2021-08-06 15:10:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:49,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:49,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:49,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985293408] [2021-08-06 15:10:49,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985293408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:49,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437631015] [2021-08-06 15:10:49,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:10:49,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:49,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:49,884 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) [2021-08-06 15:10:49,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 15:10:50,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:10:50,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:50,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:10:50,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:51,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437631015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:51,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:51,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 15:10:51,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141345099] [2021-08-06 15:10:51,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:10:51,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:51,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:10:51,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:10:51,183 INFO L87 Difference]: Start difference. First operand 897 states and 4124 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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) [2021-08-06 15:10:51,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:51,437 INFO L93 Difference]: Finished difference Result 1367 states and 5965 transitions. [2021-08-06 15:10:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:10:51,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:10:51,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:51,444 INFO L225 Difference]: With dead ends: 1367 [2021-08-06 15:10:51,444 INFO L226 Difference]: Without dead ends: 1349 [2021-08-06 15:10:51,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:10:51,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2021-08-06 15:10:51,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1029. [2021-08-06 15:10:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 4.631322957198444) internal successors, (4761), 1028 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 4761 transitions. [2021-08-06 15:10:51,478 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 4761 transitions. Word has length 22 [2021-08-06 15:10:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:51,478 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 4761 transitions. [2021-08-06 15:10:51,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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) [2021-08-06 15:10:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 4761 transitions. [2021-08-06 15:10:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:10:51,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:51,481 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:51,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 15:10:51,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:51,701 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:51,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:51,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1045738273, now seen corresponding path program 13 times [2021-08-06 15:10:51,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:51,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506610913] [2021-08-06 15:10:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:51,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:51,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:51,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506610913] [2021-08-06 15:10:51,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506610913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:51,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337322392] [2021-08-06 15:10:51,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:10:51,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:51,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:51,812 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) [2021-08-06 15:10:51,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 15:10:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:52,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:10:52,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:53,128 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:53,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337322392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:53,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:53,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 15:10:53,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340002942] [2021-08-06 15:10:53,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:10:53,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:10:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:10:53,252 INFO L87 Difference]: Start difference. First operand 1029 states and 4761 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-08-06 15:10:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:53,423 INFO L93 Difference]: Finished difference Result 984 states and 4405 transitions. [2021-08-06 15:10:53,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:10:53,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:10:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:53,427 INFO L225 Difference]: With dead ends: 984 [2021-08-06 15:10:53,427 INFO L226 Difference]: Without dead ends: 964 [2021-08-06 15:10:53,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:10:53,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-08-06 15:10:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 953. [2021-08-06 15:10:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 4.54936974789916) internal successors, (4331), 952 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:53,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 4331 transitions. [2021-08-06 15:10:53,452 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 4331 transitions. Word has length 22 [2021-08-06 15:10:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:53,452 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 4331 transitions. [2021-08-06 15:10:53,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-08-06 15:10:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 4331 transitions. [2021-08-06 15:10:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:10:53,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:53,455 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:53,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:53,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:53,677 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:53,677 INFO L82 PathProgramCache]: Analyzing trace with hash 885422979, now seen corresponding path program 14 times [2021-08-06 15:10:53,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:53,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308741020] [2021-08-06 15:10:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:53,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:53,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:53,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308741020] [2021-08-06 15:10:53,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308741020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:53,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013807122] [2021-08-06 15:10:53,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:10:53,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:53,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:53,849 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) [2021-08-06 15:10:53,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 15:10:54,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:10:54,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:54,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:10:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:55,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013807122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:55,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:55,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 15:10:55,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419223437] [2021-08-06 15:10:55,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:10:55,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:55,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:10:55,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:10:55,275 INFO L87 Difference]: Start difference. First operand 953 states and 4331 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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) [2021-08-06 15:10:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:55,447 INFO L93 Difference]: Finished difference Result 987 states and 4413 transitions. [2021-08-06 15:10:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:10:55,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:10:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:55,451 INFO L225 Difference]: With dead ends: 987 [2021-08-06 15:10:55,451 INFO L226 Difference]: Without dead ends: 978 [2021-08-06 15:10:55,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:10:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-08-06 15:10:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 954. [2021-08-06 15:10:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 4.541448058761805) internal successors, (4328), 953 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 4328 transitions. [2021-08-06 15:10:55,475 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 4328 transitions. Word has length 22 [2021-08-06 15:10:55,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:55,475 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 4328 transitions. [2021-08-06 15:10:55,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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) [2021-08-06 15:10:55,475 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 4328 transitions. [2021-08-06 15:10:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:10:55,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:55,478 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:55,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:55,692 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,SelfDestructingSolverStorable32 [2021-08-06 15:10:55,693 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2104512473, now seen corresponding path program 2 times [2021-08-06 15:10:55,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:55,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758852616] [2021-08-06 15:10:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:55,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:55,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:55,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758852616] [2021-08-06 15:10:55,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758852616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:55,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863495396] [2021-08-06 15:10:55,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:10:55,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:55,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:55,886 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) [2021-08-06 15:10:55,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 15:10:56,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:10:56,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:56,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:10:56,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:57,636 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:57,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863495396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:57,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:57,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 15:10:57,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678270526] [2021-08-06 15:10:57,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:10:57,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:57,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:10:57,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:10:57,722 INFO L87 Difference]: Start difference. First operand 954 states and 4328 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2021-08-06 15:10:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:58,011 INFO L93 Difference]: Finished difference Result 1010 states and 4472 transitions. [2021-08-06 15:10:58,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:10:58,011 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:10:58,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:58,014 INFO L225 Difference]: With dead ends: 1010 [2021-08-06 15:10:58,014 INFO L226 Difference]: Without dead ends: 993 [2021-08-06 15:10:58,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:10:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-08-06 15:10:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 960. [2021-08-06 15:10:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 4.522419186652764) internal successors, (4337), 959 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 4337 transitions. [2021-08-06 15:10:58,039 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 4337 transitions. Word has length 22 [2021-08-06 15:10:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:58,039 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 4337 transitions. [2021-08-06 15:10:58,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2021-08-06 15:10:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 4337 transitions. [2021-08-06 15:10:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:10:58,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:58,042 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:58,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:58,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:58,257 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:58,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:58,257 INFO L82 PathProgramCache]: Analyzing trace with hash -890724753, now seen corresponding path program 3 times [2021-08-06 15:10:58,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:58,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069270352] [2021-08-06 15:10:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:58,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:10:58,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:58,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069270352] [2021-08-06 15:10:58,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069270352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:58,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799116158] [2021-08-06 15:10:58,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:10:58,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:58,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:58,382 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) [2021-08-06 15:10:58,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 15:10:59,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:10:59,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:59,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:10:59,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:59,663 INFO L388 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 7 treesize of output 3 [2021-08-06 15:10:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:10:59,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799116158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:59,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:59,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:10:59,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996283036] [2021-08-06 15:10:59,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:10:59,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:59,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:10:59,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:10:59,738 INFO L87 Difference]: Start difference. First operand 960 states and 4337 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-08-06 15:10:59,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:59,914 INFO L93 Difference]: Finished difference Result 1315 states and 5575 transitions. [2021-08-06 15:10:59,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:10:59,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:10:59,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:59,919 INFO L225 Difference]: With dead ends: 1315 [2021-08-06 15:10:59,919 INFO L226 Difference]: Without dead ends: 1291 [2021-08-06 15:10:59,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:10:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-08-06 15:10:59,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 969. [2021-08-06 15:10:59,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 4.5309917355371905) internal successors, (4386), 968 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 4386 transitions. [2021-08-06 15:10:59,967 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 4386 transitions. Word has length 22 [2021-08-06 15:10:59,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:59,967 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 4386 transitions. [2021-08-06 15:10:59,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-08-06 15:10:59,967 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 4386 transitions. [2021-08-06 15:10:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:10:59,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:59,970 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:00,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:00,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:00,187 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:00,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:00,187 INFO L82 PathProgramCache]: Analyzing trace with hash 747143341, now seen corresponding path program 4 times [2021-08-06 15:11:00,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:00,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515654860] [2021-08-06 15:11:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:00,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:00,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:00,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515654860] [2021-08-06 15:11:00,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515654860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:00,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509402552] [2021-08-06 15:11:00,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:11:00,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:00,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:00,445 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) [2021-08-06 15:11:00,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 15:11:01,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:11:01,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 15:11:01,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:02,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509402552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:02,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:02,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-06 15:11:02,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393627698] [2021-08-06 15:11:02,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:11:02,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:11:02,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:11:02,261 INFO L87 Difference]: Start difference. First operand 969 states and 4386 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-06 15:11:02,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:02,600 INFO L93 Difference]: Finished difference Result 982 states and 4421 transitions. [2021-08-06 15:11:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:11:02,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 22 [2021-08-06 15:11:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:02,605 INFO L225 Difference]: With dead ends: 982 [2021-08-06 15:11:02,605 INFO L226 Difference]: Without dead ends: 980 [2021-08-06 15:11:02,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:11:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-08-06 15:11:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 976. [2021-08-06 15:11:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 4.516923076923077) internal successors, (4404), 975 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 4404 transitions. [2021-08-06 15:11:02,631 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 4404 transitions. Word has length 22 [2021-08-06 15:11:02,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:02,632 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 4404 transitions. [2021-08-06 15:11:02,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-06 15:11:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 4404 transitions. [2021-08-06 15:11:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:11:02,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:02,635 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:02,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:02,861 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,SelfDestructingSolverStorable35 [2021-08-06 15:11:02,861 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:02,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:02,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1599763145, now seen corresponding path program 5 times [2021-08-06 15:11:02,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:02,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323984676] [2021-08-06 15:11:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:02,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:03,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:03,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323984676] [2021-08-06 15:11:03,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323984676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:03,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894773102] [2021-08-06 15:11:03,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:11:03,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:03,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:03,121 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) [2021-08-06 15:11:03,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 15:11:04,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:11:04,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:04,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:11:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:04,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894773102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:04,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:04,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-06 15:11:04,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296481327] [2021-08-06 15:11:04,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:11:04,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:04,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:11:04,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:11:04,851 INFO L87 Difference]: Start difference. First operand 976 states and 4404 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-06 15:11:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:05,081 INFO L93 Difference]: Finished difference Result 983 states and 4407 transitions. [2021-08-06 15:11:05,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:11:05,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 22 [2021-08-06 15:11:05,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:05,085 INFO L225 Difference]: With dead ends: 983 [2021-08-06 15:11:05,085 INFO L226 Difference]: Without dead ends: 981 [2021-08-06 15:11:05,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 421.2ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:11:05,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-08-06 15:11:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 971. [2021-08-06 15:11:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 4.508247422680412) internal successors, (4373), 970 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 4373 transitions. [2021-08-06 15:11:05,111 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 4373 transitions. Word has length 22 [2021-08-06 15:11:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:05,111 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 4373 transitions. [2021-08-06 15:11:05,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-06 15:11:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 4373 transitions. [2021-08-06 15:11:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:11:05,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:05,114 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:05,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:05,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 15:11:05,329 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1230047171, now seen corresponding path program 6 times [2021-08-06 15:11:05,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:05,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425157171] [2021-08-06 15:11:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:05,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:05,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:05,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425157171] [2021-08-06 15:11:05,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425157171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:05,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414452719] [2021-08-06 15:11:05,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:11:05,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:05,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:05,454 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) [2021-08-06 15:11:05,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 15:11:06,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:11:06,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:06,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:11:06,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:07,172 INFO L388 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 7 treesize of output 3 [2021-08-06 15:11:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:07,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414452719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:07,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:07,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 15:11:07,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669832842] [2021-08-06 15:11:07,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:11:07,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:07,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:11:07,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:11:07,254 INFO L87 Difference]: Start difference. First operand 971 states and 4373 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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) [2021-08-06 15:11:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:07,640 INFO L93 Difference]: Finished difference Result 1010 states and 4475 transitions. [2021-08-06 15:11:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:11:07,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:11:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:07,645 INFO L225 Difference]: With dead ends: 1010 [2021-08-06 15:11:07,645 INFO L226 Difference]: Without dead ends: 993 [2021-08-06 15:11:07,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 488.1ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:11:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-08-06 15:11:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 968. [2021-08-06 15:11:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 4.514994829369183) internal successors, (4366), 967 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 4366 transitions. [2021-08-06 15:11:07,672 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 4366 transitions. Word has length 22 [2021-08-06 15:11:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:07,672 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 4366 transitions. [2021-08-06 15:11:07,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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) [2021-08-06 15:11:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 4366 transitions. [2021-08-06 15:11:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:11:07,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:07,675 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:07,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:07,888 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,SelfDestructingSolverStorable37 [2021-08-06 15:11:07,889 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash 322832105, now seen corresponding path program 7 times [2021-08-06 15:11:07,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:07,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933893029] [2021-08-06 15:11:07,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:07,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:08,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:08,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933893029] [2021-08-06 15:11:08,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933893029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:08,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072714140] [2021-08-06 15:11:08,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:11:08,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:08,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:08,129 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) [2021-08-06 15:11:08,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 15:11:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:09,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:11:09,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:10,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072714140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:10,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:10,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-06 15:11:10,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820686027] [2021-08-06 15:11:10,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:11:10,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:10,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:11:10,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:11:10,039 INFO L87 Difference]: Start difference. First operand 968 states and 4366 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-06 15:11:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:10,229 INFO L93 Difference]: Finished difference Result 980 states and 4388 transitions. [2021-08-06 15:11:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:11:10,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 22 [2021-08-06 15:11:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:10,231 INFO L225 Difference]: With dead ends: 980 [2021-08-06 15:11:10,231 INFO L226 Difference]: Without dead ends: 978 [2021-08-06 15:11:10,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:11:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-08-06 15:11:10,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 968. [2021-08-06 15:11:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 4.509824198552224) internal successors, (4361), 967 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 4361 transitions. [2021-08-06 15:11:10,253 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 4361 transitions. Word has length 22 [2021-08-06 15:11:10,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:10,253 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 4361 transitions. [2021-08-06 15:11:10,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-08-06 15:11:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 4361 transitions. [2021-08-06 15:11:10,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:10,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:10,256 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:10,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:10,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 15:11:10,482 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash 54281436, now seen corresponding path program 6 times [2021-08-06 15:11:10,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:10,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776573787] [2021-08-06 15:11:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:10,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:10,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:10,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776573787] [2021-08-06 15:11:10,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776573787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:10,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323904104] [2021-08-06 15:11:10,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:11:10,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:10,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:10,643 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) [2021-08-06 15:11:10,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 15:11:11,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:11:11,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:11,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:11:11,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:12,428 INFO L388 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 7 treesize of output 3 [2021-08-06 15:11:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:12,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323904104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:12,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:12,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 15:11:12,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284958098] [2021-08-06 15:11:12,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:11:12,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:12,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:11:12,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:11:12,740 INFO L87 Difference]: Start difference. First operand 968 states and 4361 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-08-06 15:11:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:13,033 INFO L93 Difference]: Finished difference Result 1408 states and 5537 transitions. [2021-08-06 15:11:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:11:13,033 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 23 [2021-08-06 15:11:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:13,036 INFO L225 Difference]: With dead ends: 1408 [2021-08-06 15:11:13,036 INFO L226 Difference]: Without dead ends: 1377 [2021-08-06 15:11:13,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 403.4ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:11:13,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-08-06 15:11:13,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 906. [2021-08-06 15:11:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 4.415469613259669) internal successors, (3996), 905 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 3996 transitions. [2021-08-06 15:11:13,061 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 3996 transitions. Word has length 23 [2021-08-06 15:11:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:13,061 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 3996 transitions. [2021-08-06 15:11:13,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-08-06 15:11:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 3996 transitions. [2021-08-06 15:11:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:13,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:13,064 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:13,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 15:11:13,284 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,SelfDestructingSolverStorable39 [2021-08-06 15:11:13,285 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:13,285 INFO L82 PathProgramCache]: Analyzing trace with hash -970432488, now seen corresponding path program 7 times [2021-08-06 15:11:13,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:13,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835359] [2021-08-06 15:11:13,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:13,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:13,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:13,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835359] [2021-08-06 15:11:13,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:13,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673821147] [2021-08-06 15:11:13,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:11:13,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:13,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:13,459 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) [2021-08-06 15:11:13,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 15:11:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:14,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:11:14,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:15,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673821147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:15,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:15,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 15:11:15,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137676269] [2021-08-06 15:11:15,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:11:15,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:15,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:11:15,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:11:15,378 INFO L87 Difference]: Start difference. First operand 906 states and 3996 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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) [2021-08-06 15:11:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:15,594 INFO L93 Difference]: Finished difference Result 818 states and 3446 transitions. [2021-08-06 15:11:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:11:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 23 [2021-08-06 15:11:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:15,596 INFO L225 Difference]: With dead ends: 818 [2021-08-06 15:11:15,596 INFO L226 Difference]: Without dead ends: 797 [2021-08-06 15:11:15,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:11:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-08-06 15:11:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 781. [2021-08-06 15:11:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 4.301282051282051) internal successors, (3355), 780 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 3355 transitions. [2021-08-06 15:11:15,609 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 3355 transitions. Word has length 23 [2021-08-06 15:11:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:15,609 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 3355 transitions. [2021-08-06 15:11:15,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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) [2021-08-06 15:11:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 3355 transitions. [2021-08-06 15:11:15,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:15,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:15,611 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:15,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:15,811 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,SelfDestructingSolverStorable40 [2021-08-06 15:11:15,812 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:15,812 INFO L82 PathProgramCache]: Analyzing trace with hash -50132612, now seen corresponding path program 15 times [2021-08-06 15:11:15,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:15,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931128757] [2021-08-06 15:11:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:15,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:15,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:15,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931128757] [2021-08-06 15:11:15,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931128757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:15,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039323738] [2021-08-06 15:11:15,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:11:15,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:15,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:15,975 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) [2021-08-06 15:11:15,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 15:11:17,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:11:17,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:17,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 15:11:17,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:17,723 INFO L388 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 7 treesize of output 3 [2021-08-06 15:11:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:17,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039323738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:17,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:17,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-06 15:11:17,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077724425] [2021-08-06 15:11:17,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:11:17,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:17,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:11:17,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:11:17,934 INFO L87 Difference]: Start difference. First operand 781 states and 3355 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2021-08-06 15:11:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:18,115 INFO L93 Difference]: Finished difference Result 766 states and 2803 transitions. [2021-08-06 15:11:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:11:18,115 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 23 [2021-08-06 15:11:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:18,116 INFO L225 Difference]: With dead ends: 766 [2021-08-06 15:11:18,117 INFO L226 Difference]: Without dead ends: 758 [2021-08-06 15:11:18,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:11:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-08-06 15:11:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 628. [2021-08-06 15:11:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.974481658692185) internal successors, (2492), 627 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2492 transitions. [2021-08-06 15:11:18,130 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2492 transitions. Word has length 23 [2021-08-06 15:11:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:18,130 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 2492 transitions. [2021-08-06 15:11:18,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2021-08-06 15:11:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2492 transitions. [2021-08-06 15:11:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:18,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:18,132 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:18,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:18,344 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,SelfDestructingSolverStorable41 [2021-08-06 15:11:18,345 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:18,345 INFO L82 PathProgramCache]: Analyzing trace with hash -210447906, now seen corresponding path program 16 times [2021-08-06 15:11:18,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:18,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318140128] [2021-08-06 15:11:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:18,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:18,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:18,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318140128] [2021-08-06 15:11:18,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318140128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:18,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223202373] [2021-08-06 15:11:18,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:11:18,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:18,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:18,512 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) [2021-08-06 15:11:18,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 15:11:19,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:11:19,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:19,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:11:19,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:20,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223202373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:20,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:20,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 15:11:20,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659712297] [2021-08-06 15:11:20,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:11:20,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:20,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:11:20,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:11:20,400 INFO L87 Difference]: Start difference. First operand 628 states and 2492 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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) [2021-08-06 15:11:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:20,489 INFO L93 Difference]: Finished difference Result 655 states and 2547 transitions. [2021-08-06 15:11:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:11:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 23 [2021-08-06 15:11:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:20,491 INFO L225 Difference]: With dead ends: 655 [2021-08-06 15:11:20,491 INFO L226 Difference]: Without dead ends: 643 [2021-08-06 15:11:20,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:11:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-08-06 15:11:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 624. [2021-08-06 15:11:20,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 3.9646869983948636) internal successors, (2470), 623 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2470 transitions. [2021-08-06 15:11:20,503 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2470 transitions. Word has length 23 [2021-08-06 15:11:20,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:20,503 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 2470 transitions. [2021-08-06 15:11:20,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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) [2021-08-06 15:11:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2470 transitions. [2021-08-06 15:11:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:20,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:20,505 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:20,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:20,724 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,SelfDestructingSolverStorable42 [2021-08-06 15:11:20,725 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:20,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:20,725 INFO L82 PathProgramCache]: Analyzing trace with hash -634759142, now seen corresponding path program 17 times [2021-08-06 15:11:20,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:20,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499854500] [2021-08-06 15:11:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:20,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:20,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:20,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499854500] [2021-08-06 15:11:20,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499854500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:20,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852442859] [2021-08-06 15:11:20,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:11:20,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:20,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:20,908 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) [2021-08-06 15:11:20,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 15:11:22,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:11:22,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:11:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:22,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852442859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:22,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:22,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 15:11:22,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028478398] [2021-08-06 15:11:22,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:11:22,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:11:22,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:11:22,924 INFO L87 Difference]: Start difference. First operand 624 states and 2470 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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) [2021-08-06 15:11:23,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:23,101 INFO L93 Difference]: Finished difference Result 620 states and 2341 transitions. [2021-08-06 15:11:23,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:11:23,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 23 [2021-08-06 15:11:23,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:23,103 INFO L225 Difference]: With dead ends: 620 [2021-08-06 15:11:23,103 INFO L226 Difference]: Without dead ends: 610 [2021-08-06 15:11:23,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:11:23,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-08-06 15:11:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 591. [2021-08-06 15:11:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.852542372881356) internal successors, (2273), 590 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 2273 transitions. [2021-08-06 15:11:23,115 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 2273 transitions. Word has length 23 [2021-08-06 15:11:23,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:23,115 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 2273 transitions. [2021-08-06 15:11:23,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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) [2021-08-06 15:11:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 2273 transitions. [2021-08-06 15:11:23,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:23,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:23,117 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:23,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:23,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:23,329 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:23,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:23,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1319415300, now seen corresponding path program 18 times [2021-08-06 15:11:23,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:23,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527588910] [2021-08-06 15:11:23,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:23,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:23,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:23,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527588910] [2021-08-06 15:11:23,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527588910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:23,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508412693] [2021-08-06 15:11:23,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:11:23,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:23,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:23,509 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) [2021-08-06 15:11:23,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 15:11:24,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:11:24,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:24,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:11:24,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:25,484 INFO L388 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 7 treesize of output 3 [2021-08-06 15:11:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:25,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508412693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:25,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:25,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 15:11:25,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335945330] [2021-08-06 15:11:25,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:11:25,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:25,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:11:25,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:11:25,727 INFO L87 Difference]: Start difference. First operand 591 states and 2273 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-06 15:11:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:25,922 INFO L93 Difference]: Finished difference Result 709 states and 2622 transitions. [2021-08-06 15:11:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:11:25,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 23 [2021-08-06 15:11:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:25,924 INFO L225 Difference]: With dead ends: 709 [2021-08-06 15:11:25,924 INFO L226 Difference]: Without dead ends: 703 [2021-08-06 15:11:25,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:11:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-08-06 15:11:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 593. [2021-08-06 15:11:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.866554054054054) internal successors, (2289), 592 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 2289 transitions. [2021-08-06 15:11:25,936 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 2289 transitions. Word has length 23 [2021-08-06 15:11:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:25,936 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 2289 transitions. [2021-08-06 15:11:25,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-06 15:11:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 2289 transitions. [2021-08-06 15:11:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:25,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:25,938 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:25,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 15:11:26,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:26,141 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:26,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:26,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1479730594, now seen corresponding path program 19 times [2021-08-06 15:11:26,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:26,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266729020] [2021-08-06 15:11:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:26,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:26,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:26,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266729020] [2021-08-06 15:11:26,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266729020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:26,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360339449] [2021-08-06 15:11:26,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:11:26,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:26,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:26,309 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) [2021-08-06 15:11:26,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 15:11:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:27,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:11:27,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:28,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360339449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:28,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:28,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 15:11:28,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821898316] [2021-08-06 15:11:28,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:11:28,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:28,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:11:28,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:11:28,546 INFO L87 Difference]: Start difference. First operand 593 states and 2289 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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) [2021-08-06 15:11:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:28,676 INFO L93 Difference]: Finished difference Result 593 states and 2217 transitions. [2021-08-06 15:11:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:11:28,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 23 [2021-08-06 15:11:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:28,678 INFO L225 Difference]: With dead ends: 593 [2021-08-06 15:11:28,678 INFO L226 Difference]: Without dead ends: 571 [2021-08-06 15:11:28,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:11:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-08-06 15:11:28,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 552. [2021-08-06 15:11:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 3.8457350272232307) internal successors, (2119), 551 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 2119 transitions. [2021-08-06 15:11:28,686 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 2119 transitions. Word has length 23 [2021-08-06 15:11:28,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:28,686 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 2119 transitions. [2021-08-06 15:11:28,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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) [2021-08-06 15:11:28,686 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 2119 transitions. [2021-08-06 15:11:28,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:28,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:28,687 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:28,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:28,887 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,SelfDestructingSolverStorable45 [2021-08-06 15:11:28,888 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:28,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:28,888 INFO L82 PathProgramCache]: Analyzing trace with hash -317966090, now seen corresponding path program 8 times [2021-08-06 15:11:28,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:28,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559344901] [2021-08-06 15:11:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:28,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:29,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:29,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559344901] [2021-08-06 15:11:29,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559344901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:29,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535782888] [2021-08-06 15:11:29,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:11:29,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:29,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:29,037 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) [2021-08-06 15:11:29,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 15:11:30,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:11:30,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:30,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:11:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:31,323 INFO L388 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 7 treesize of output 3 [2021-08-06 15:11:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:31,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535782888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:31,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:31,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 15:11:31,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878066788] [2021-08-06 15:11:31,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:11:31,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:31,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:11:31,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:11:31,436 INFO L87 Difference]: Start difference. First operand 552 states and 2119 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-08-06 15:11:31,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:31,745 INFO L93 Difference]: Finished difference Result 633 states and 2332 transitions. [2021-08-06 15:11:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:11:31,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 23 [2021-08-06 15:11:31,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:31,747 INFO L225 Difference]: With dead ends: 633 [2021-08-06 15:11:31,747 INFO L226 Difference]: Without dead ends: 600 [2021-08-06 15:11:31,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 427.1ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:11:31,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-08-06 15:11:31,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 562. [2021-08-06 15:11:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 3.8253119429590017) internal successors, (2146), 561 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 2146 transitions. [2021-08-06 15:11:31,755 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 2146 transitions. Word has length 23 [2021-08-06 15:11:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:31,755 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 2146 transitions. [2021-08-06 15:11:31,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-08-06 15:11:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 2146 transitions. [2021-08-06 15:11:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:31,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:31,756 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:31,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:31,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 15:11:31,957 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash -830689232, now seen corresponding path program 9 times [2021-08-06 15:11:31,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:31,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287644286] [2021-08-06 15:11:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:31,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:32,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:32,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287644286] [2021-08-06 15:11:32,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287644286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:32,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723533018] [2021-08-06 15:11:32,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:11:32,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:32,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:32,098 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) [2021-08-06 15:11:32,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 15:11:33,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:11:33,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:33,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:11:33,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:34,199 INFO L388 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 7 treesize of output 3 [2021-08-06 15:11:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:34,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723533018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:34,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:34,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 15:11:34,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655695137] [2021-08-06 15:11:34,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:11:34,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:34,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:11:34,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:11:34,278 INFO L87 Difference]: Start difference. First operand 562 states and 2146 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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) [2021-08-06 15:11:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:34,555 INFO L93 Difference]: Finished difference Result 656 states and 2385 transitions. [2021-08-06 15:11:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:11:34,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 23 [2021-08-06 15:11:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:34,557 INFO L225 Difference]: With dead ends: 656 [2021-08-06 15:11:34,557 INFO L226 Difference]: Without dead ends: 617 [2021-08-06 15:11:34,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:11:34,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-08-06 15:11:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 556. [2021-08-06 15:11:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.8396396396396395) internal successors, (2131), 555 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 2131 transitions. [2021-08-06 15:11:34,566 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 2131 transitions. Word has length 23 [2021-08-06 15:11:34,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:34,566 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 2131 transitions. [2021-08-06 15:11:34,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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) [2021-08-06 15:11:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 2131 transitions. [2021-08-06 15:11:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:34,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:34,568 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:34,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:34,788 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,SelfDestructingSolverStorable47 [2021-08-06 15:11:34,789 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:34,789 INFO L82 PathProgramCache]: Analyzing trace with hash -760865230, now seen corresponding path program 10 times [2021-08-06 15:11:34,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:34,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585785362] [2021-08-06 15:11:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:34,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:11:34,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:34,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585785362] [2021-08-06 15:11:34,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585785362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:34,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321314754] [2021-08-06 15:11:34,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:11:34,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:34,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:34,913 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) [2021-08-06 15:11:34,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 15:11:36,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:11:36,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:36,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:11:36,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:36,918 INFO L388 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 7 treesize of output 3 [2021-08-06 15:11:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:11:37,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321314754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:37,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:37,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 15:11:37,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813590841] [2021-08-06 15:11:37,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:11:37,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:11:37,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:11:37,024 INFO L87 Difference]: Start difference. First operand 556 states and 2131 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-08-06 15:11:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:37,285 INFO L93 Difference]: Finished difference Result 631 states and 2308 transitions. [2021-08-06 15:11:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:11:37,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 23 [2021-08-06 15:11:37,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:37,286 INFO L225 Difference]: With dead ends: 631 [2021-08-06 15:11:37,286 INFO L226 Difference]: Without dead ends: 598 [2021-08-06 15:11:37,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 341.3ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:11:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-08-06 15:11:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 557. [2021-08-06 15:11:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.818345323741007) internal successors, (2123), 556 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 2123 transitions. [2021-08-06 15:11:37,295 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 2123 transitions. Word has length 23 [2021-08-06 15:11:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:37,295 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 2123 transitions. [2021-08-06 15:11:37,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-08-06 15:11:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 2123 transitions. [2021-08-06 15:11:37,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:37,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:37,296 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:37,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:37,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:37,497 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:37,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:37,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1273588372, now seen corresponding path program 11 times [2021-08-06 15:11:37,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:37,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220712525] [2021-08-06 15:11:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:37,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:11:37,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:37,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220712525] [2021-08-06 15:11:37,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220712525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:37,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686354837] [2021-08-06 15:11:37,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:11:37,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:37,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:37,625 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) [2021-08-06 15:11:37,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 15:11:39,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:11:39,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:39,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:11:39,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:11:39,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686354837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:39,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:39,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 15:11:39,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785842825] [2021-08-06 15:11:39,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:11:39,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:39,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:11:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:11:39,719 INFO L87 Difference]: Start difference. First operand 557 states and 2123 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:39,868 INFO L93 Difference]: Finished difference Result 625 states and 2276 transitions. [2021-08-06 15:11:39,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:11:39,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:11:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:39,870 INFO L225 Difference]: With dead ends: 625 [2021-08-06 15:11:39,870 INFO L226 Difference]: Without dead ends: 582 [2021-08-06 15:11:39,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:11:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-08-06 15:11:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 535. [2021-08-06 15:11:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 3.8352059925093633) internal successors, (2048), 534 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 2048 transitions. [2021-08-06 15:11:39,880 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 2048 transitions. Word has length 23 [2021-08-06 15:11:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:39,880 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 2048 transitions. [2021-08-06 15:11:39,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 2048 transitions. [2021-08-06 15:11:39,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:39,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:39,882 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:39,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:40,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 15:11:40,105 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:40,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1733533840, now seen corresponding path program 12 times [2021-08-06 15:11:40,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:40,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699823775] [2021-08-06 15:11:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:40,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:40,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:40,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699823775] [2021-08-06 15:11:40,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699823775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:40,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620886228] [2021-08-06 15:11:40,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:11:40,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:40,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:40,349 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) [2021-08-06 15:11:40,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 15:11:41,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:11:41,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:41,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:11:41,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:42,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620886228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:42,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:42,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 15:11:42,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410080707] [2021-08-06 15:11:42,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:11:42,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:11:42,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:11:42,771 INFO L87 Difference]: Start difference. First operand 535 states and 2048 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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) [2021-08-06 15:11:42,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:42,976 INFO L93 Difference]: Finished difference Result 649 states and 2363 transitions. [2021-08-06 15:11:42,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:11:42,976 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 23 [2021-08-06 15:11:42,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:42,978 INFO L225 Difference]: With dead ends: 649 [2021-08-06 15:11:42,978 INFO L226 Difference]: Without dead ends: 626 [2021-08-06 15:11:42,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:11:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-08-06 15:11:42,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 555. [2021-08-06 15:11:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 3.8231046931407944) internal successors, (2118), 554 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 2118 transitions. [2021-08-06 15:11:42,986 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 2118 transitions. Word has length 23 [2021-08-06 15:11:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:42,986 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 2118 transitions. [2021-08-06 15:11:42,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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) [2021-08-06 15:11:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 2118 transitions. [2021-08-06 15:11:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:42,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:42,987 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:43,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 15:11:43,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:43,188 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:43,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:43,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1561565200, now seen corresponding path program 13 times [2021-08-06 15:11:43,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:43,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685758229] [2021-08-06 15:11:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:43,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:43,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:43,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685758229] [2021-08-06 15:11:43,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685758229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:43,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706197372] [2021-08-06 15:11:43,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:11:43,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:43,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:43,489 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) [2021-08-06 15:11:43,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 15:11:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:45,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:11:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:45,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706197372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:45,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:45,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 15:11:45,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526499733] [2021-08-06 15:11:45,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:11:45,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:45,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:11:45,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:11:45,758 INFO L87 Difference]: Start difference. First operand 555 states and 2118 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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) [2021-08-06 15:11:45,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:45,917 INFO L93 Difference]: Finished difference Result 659 states and 2392 transitions. [2021-08-06 15:11:45,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:11:45,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 23 [2021-08-06 15:11:45,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:45,918 INFO L225 Difference]: With dead ends: 659 [2021-08-06 15:11:45,918 INFO L226 Difference]: Without dead ends: 636 [2021-08-06 15:11:45,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 326.3ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:11:45,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-06 15:11:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 557. [2021-08-06 15:11:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.814748201438849) internal successors, (2121), 556 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 2121 transitions. [2021-08-06 15:11:45,927 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 2121 transitions. Word has length 23 [2021-08-06 15:11:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:45,927 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 2121 transitions. [2021-08-06 15:11:45,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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) [2021-08-06 15:11:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 2121 transitions. [2021-08-06 15:11:45,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:45,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:45,929 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:45,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 15:11:46,156 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,SelfDestructingSolverStorable51 [2021-08-06 15:11:46,157 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:46,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:46,157 INFO L82 PathProgramCache]: Analyzing trace with hash 869665042, now seen corresponding path program 14 times [2021-08-06 15:11:46,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:46,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728420697] [2021-08-06 15:11:46,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:46,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:46,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:46,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728420697] [2021-08-06 15:11:46,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728420697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:46,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008203204] [2021-08-06 15:11:46,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:11:46,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:46,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:46,467 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) [2021-08-06 15:11:46,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 15:11:48,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:11:48,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:48,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:11:48,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:48,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008203204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:48,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:48,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 15:11:48,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477118388] [2021-08-06 15:11:48,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:11:48,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:48,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:11:48,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:11:48,848 INFO L87 Difference]: Start difference. First operand 557 states and 2121 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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) [2021-08-06 15:11:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:49,221 INFO L93 Difference]: Finished difference Result 596 states and 2223 transitions. [2021-08-06 15:11:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:11:49,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 23 [2021-08-06 15:11:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:49,223 INFO L225 Difference]: With dead ends: 596 [2021-08-06 15:11:49,223 INFO L226 Difference]: Without dead ends: 581 [2021-08-06 15:11:49,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:11:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-08-06 15:11:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 557. [2021-08-06 15:11:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.8219424460431655) internal successors, (2125), 556 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 2125 transitions. [2021-08-06 15:11:49,231 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 2125 transitions. Word has length 23 [2021-08-06 15:11:49,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:49,231 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 2125 transitions. [2021-08-06 15:11:49,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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) [2021-08-06 15:11:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 2125 transitions. [2021-08-06 15:11:49,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:49,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:49,232 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:49,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 15:11:49,432 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,SelfDestructingSolverStorable52 [2021-08-06 15:11:49,433 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1985876436, now seen corresponding path program 15 times [2021-08-06 15:11:49,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:49,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317644214] [2021-08-06 15:11:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:49,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:49,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:49,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317644214] [2021-08-06 15:11:49,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317644214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:49,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160806325] [2021-08-06 15:11:49,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:11:49,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:49,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:49,758 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) [2021-08-06 15:11:49,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 15:11:51,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:11:51,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:51,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:11:51,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:52,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160806325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:52,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:52,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 15:11:52,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087761037] [2021-08-06 15:11:52,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:11:52,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:52,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:11:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:11:52,190 INFO L87 Difference]: Start difference. First operand 557 states and 2125 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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) [2021-08-06 15:11:52,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:52,360 INFO L93 Difference]: Finished difference Result 626 states and 2297 transitions. [2021-08-06 15:11:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:11:52,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 23 [2021-08-06 15:11:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:52,361 INFO L225 Difference]: With dead ends: 626 [2021-08-06 15:11:52,361 INFO L226 Difference]: Without dead ends: 603 [2021-08-06 15:11:52,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:11:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-08-06 15:11:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 559. [2021-08-06 15:11:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.8207885304659497) internal successors, (2132), 558 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 2132 transitions. [2021-08-06 15:11:52,369 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 2132 transitions. Word has length 23 [2021-08-06 15:11:52,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:52,369 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 2132 transitions. [2021-08-06 15:11:52,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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) [2021-08-06 15:11:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 2132 transitions. [2021-08-06 15:11:52,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:52,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:52,370 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:52,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 15:11:52,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:52,570 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:52,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:52,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1722284846, now seen corresponding path program 16 times [2021-08-06 15:11:52,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:52,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304307734] [2021-08-06 15:11:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:52,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:52,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:52,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304307734] [2021-08-06 15:11:52,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304307734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:52,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910563759] [2021-08-06 15:11:52,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:11:52,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:52,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:52,782 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) [2021-08-06 15:11:52,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 15:11:54,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:11:54,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:54,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:11:54,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:55,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910563759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:55,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:55,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 15:11:55,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545678136] [2021-08-06 15:11:55,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:11:55,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:55,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:11:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:11:55,364 INFO L87 Difference]: Start difference. First operand 559 states and 2132 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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) [2021-08-06 15:11:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:55,623 INFO L93 Difference]: Finished difference Result 608 states and 2249 transitions. [2021-08-06 15:11:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:11:55,623 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 23 [2021-08-06 15:11:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:55,625 INFO L225 Difference]: With dead ends: 608 [2021-08-06 15:11:55,625 INFO L226 Difference]: Without dead ends: 593 [2021-08-06 15:11:55,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:11:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-08-06 15:11:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 555. [2021-08-06 15:11:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 3.8267148014440435) internal successors, (2120), 554 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 2120 transitions. [2021-08-06 15:11:55,633 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 2120 transitions. Word has length 23 [2021-08-06 15:11:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:55,633 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 2120 transitions. [2021-08-06 15:11:55,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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) [2021-08-06 15:11:55,633 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 2120 transitions. [2021-08-06 15:11:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:55,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:55,634 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:55,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 15:11:55,835 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,SelfDestructingSolverStorable54 [2021-08-06 15:11:55,835 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:55,835 INFO L82 PathProgramCache]: Analyzing trace with hash -25832230, now seen corresponding path program 17 times [2021-08-06 15:11:55,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:55,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724308757] [2021-08-06 15:11:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:55,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:56,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:56,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724308757] [2021-08-06 15:11:56,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724308757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:56,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133894469] [2021-08-06 15:11:56,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:11:56,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:56,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:56,031 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) [2021-08-06 15:11:56,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 15:11:57,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:11:57,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:11:57,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:11:57,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:58,679 INFO L388 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 7 treesize of output 3 [2021-08-06 15:11:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:58,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133894469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:58,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:58,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 15:11:58,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879707511] [2021-08-06 15:11:58,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:11:58,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:58,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:11:58,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:11:58,815 INFO L87 Difference]: Start difference. First operand 555 states and 2120 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2021-08-06 15:11:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:58,971 INFO L93 Difference]: Finished difference Result 596 states and 2209 transitions. [2021-08-06 15:11:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:11:58,971 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 23 [2021-08-06 15:11:58,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:58,973 INFO L225 Difference]: With dead ends: 596 [2021-08-06 15:11:58,973 INFO L226 Difference]: Without dead ends: 563 [2021-08-06 15:11:58,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:11:58,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-08-06 15:11:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 545. [2021-08-06 15:11:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.8363970588235294) internal successors, (2087), 544 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 2087 transitions. [2021-08-06 15:11:58,981 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 2087 transitions. Word has length 23 [2021-08-06 15:11:58,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:58,981 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 2087 transitions. [2021-08-06 15:11:58,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2021-08-06 15:11:58,981 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 2087 transitions. [2021-08-06 15:11:58,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:11:58,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:58,982 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:59,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 15:11:59,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 15:11:59,183 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:11:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:59,183 INFO L82 PathProgramCache]: Analyzing trace with hash -538555372, now seen corresponding path program 18 times [2021-08-06 15:11:59,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:59,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634256458] [2021-08-06 15:11:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:59,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:59,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:59,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634256458] [2021-08-06 15:11:59,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634256458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:59,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362218548] [2021-08-06 15:11:59,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:11:59,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:59,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:59,327 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) [2021-08-06 15:11:59,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 15:12:01,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:12:01,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:01,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:12:01,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:01,946 INFO L388 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 7 treesize of output 3 [2021-08-06 15:12:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:02,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362218548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:02,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:02,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 15:12:02,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68750645] [2021-08-06 15:12:02,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:12:02,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:12:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:12:02,028 INFO L87 Difference]: Start difference. First operand 545 states and 2087 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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) [2021-08-06 15:12:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:02,442 INFO L93 Difference]: Finished difference Result 595 states and 2193 transitions. [2021-08-06 15:12:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:12:02,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 23 [2021-08-06 15:12:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:02,443 INFO L225 Difference]: With dead ends: 595 [2021-08-06 15:12:02,443 INFO L226 Difference]: Without dead ends: 556 [2021-08-06 15:12:02,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 540.5ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:12:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-08-06 15:12:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 524. [2021-08-06 15:12:02,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.8680688336520075) internal successors, (2023), 523 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:02,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 2023 transitions. [2021-08-06 15:12:02,451 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 2023 transitions. Word has length 23 [2021-08-06 15:12:02,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:02,451 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 2023 transitions. [2021-08-06 15:12:02,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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) [2021-08-06 15:12:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 2023 transitions. [2021-08-06 15:12:02,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:12:02,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:02,452 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:02,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:02,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:02,653 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:02,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:02,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1830311628, now seen corresponding path program 19 times [2021-08-06 15:12:02,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:02,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422369095] [2021-08-06 15:12:02,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:02,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:02,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:02,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422369095] [2021-08-06 15:12:02,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422369095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:02,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843267771] [2021-08-06 15:12:02,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:12:02,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:02,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:02,891 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) [2021-08-06 15:12:02,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 15:12:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:04,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:12:04,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:05,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843267771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:05,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:05,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 15:12:05,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369266] [2021-08-06 15:12:05,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:12:05,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:05,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:12:05,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:12:05,519 INFO L87 Difference]: Start difference. First operand 524 states and 2023 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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) [2021-08-06 15:12:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:05,696 INFO L93 Difference]: Finished difference Result 621 states and 2262 transitions. [2021-08-06 15:12:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:12:05,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 23 [2021-08-06 15:12:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:05,697 INFO L225 Difference]: With dead ends: 621 [2021-08-06 15:12:05,697 INFO L226 Difference]: Without dead ends: 598 [2021-08-06 15:12:05,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:12:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-08-06 15:12:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 514. [2021-08-06 15:12:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.8596491228070176) internal successors, (1980), 513 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1980 transitions. [2021-08-06 15:12:05,705 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1980 transitions. Word has length 23 [2021-08-06 15:12:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:05,705 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1980 transitions. [2021-08-06 15:12:05,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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) [2021-08-06 15:12:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1980 transitions. [2021-08-06 15:12:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:05,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:05,706 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:05,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 15:12:05,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:05,906 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:05,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:05,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1567723017, now seen corresponding path program 20 times [2021-08-06 15:12:05,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:05,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916961980] [2021-08-06 15:12:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:05,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:06,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:06,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916961980] [2021-08-06 15:12:06,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916961980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:06,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14468411] [2021-08-06 15:12:06,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:06,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:06,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:06,165 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) [2021-08-06 15:12:06,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 15:12:08,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:08,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:08,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:12:08,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:09,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14468411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:09,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:09,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:12:09,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619022791] [2021-08-06 15:12:09,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:12:09,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:09,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:12:09,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:12:09,292 INFO L87 Difference]: Start difference. First operand 514 states and 1980 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-08-06 15:12:09,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:09,757 INFO L93 Difference]: Finished difference Result 542 states and 2044 transitions. [2021-08-06 15:12:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:12:09,758 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 24 [2021-08-06 15:12:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:09,759 INFO L225 Difference]: With dead ends: 542 [2021-08-06 15:12:09,759 INFO L226 Difference]: Without dead ends: 530 [2021-08-06 15:12:09,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 668.1ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:12:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-08-06 15:12:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 520. [2021-08-06 15:12:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 3.836223506743738) internal successors, (1991), 519 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1991 transitions. [2021-08-06 15:12:09,766 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1991 transitions. Word has length 24 [2021-08-06 15:12:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:09,766 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1991 transitions. [2021-08-06 15:12:09,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-08-06 15:12:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1991 transitions. [2021-08-06 15:12:09,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:09,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:09,767 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:09,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 15:12:09,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:09,969 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:09,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1044309877, now seen corresponding path program 21 times [2021-08-06 15:12:09,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:09,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612560509] [2021-08-06 15:12:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:09,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:10,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:10,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612560509] [2021-08-06 15:12:10,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612560509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:10,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367593948] [2021-08-06 15:12:10,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:10,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:10,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:10,257 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) [2021-08-06 15:12:10,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 15:12:12,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:12:12,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:12,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:12,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:13,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367593948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:13,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:13,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:12:13,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21318968] [2021-08-06 15:12:13,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:12:13,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:13,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:12:13,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:12:13,357 INFO L87 Difference]: Start difference. First operand 520 states and 1991 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:13,616 INFO L93 Difference]: Finished difference Result 540 states and 2030 transitions. [2021-08-06 15:12:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:12:13,616 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:12:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:13,617 INFO L225 Difference]: With dead ends: 540 [2021-08-06 15:12:13,617 INFO L226 Difference]: Without dead ends: 536 [2021-08-06 15:12:13,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 503.1ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:12:13,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-08-06 15:12:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 526. [2021-08-06 15:12:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 3.8133333333333335) internal successors, (2002), 525 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 2002 transitions. [2021-08-06 15:12:13,624 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 2002 transitions. Word has length 24 [2021-08-06 15:12:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:13,624 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 2002 transitions. [2021-08-06 15:12:13,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 2002 transitions. [2021-08-06 15:12:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:13,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:13,625 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:13,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:13,825 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,SelfDestructingSolverStorable59 [2021-08-06 15:12:13,826 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:13,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1327879959, now seen corresponding path program 22 times [2021-08-06 15:12:13,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:13,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788585993] [2021-08-06 15:12:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:13,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:14,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:14,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788585993] [2021-08-06 15:12:14,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788585993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:14,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010437552] [2021-08-06 15:12:14,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:12:14,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:14,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:14,071 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) [2021-08-06 15:12:14,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 15:12:16,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:12:16,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:16,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:12:16,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:17,076 INFO L388 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 7 treesize of output 3 [2021-08-06 15:12:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:17,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010437552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:17,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:17,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:12:17,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224928953] [2021-08-06 15:12:17,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:12:17,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:17,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:12:17,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:12:17,212 INFO L87 Difference]: Start difference. First operand 526 states and 2002 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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) [2021-08-06 15:12:17,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:17,341 INFO L93 Difference]: Finished difference Result 598 states and 2198 transitions. [2021-08-06 15:12:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:12:17,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-08-06 15:12:17,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:17,343 INFO L225 Difference]: With dead ends: 598 [2021-08-06 15:12:17,343 INFO L226 Difference]: Without dead ends: 585 [2021-08-06 15:12:17,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:12:17,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-08-06 15:12:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 532. [2021-08-06 15:12:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 3.8210922787193975) internal successors, (2029), 531 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 2029 transitions. [2021-08-06 15:12:17,350 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 2029 transitions. Word has length 24 [2021-08-06 15:12:17,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:17,350 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 2029 transitions. [2021-08-06 15:12:17,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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) [2021-08-06 15:12:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 2029 transitions. [2021-08-06 15:12:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:17,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:17,351 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:17,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 15:12:17,551 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,SelfDestructingSolverStorable60 [2021-08-06 15:12:17,552 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:17,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1942373413, now seen corresponding path program 23 times [2021-08-06 15:12:17,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:17,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400206861] [2021-08-06 15:12:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:17,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:17,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:17,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400206861] [2021-08-06 15:12:17,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400206861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:17,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711256355] [2021-08-06 15:12:17,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:12:17,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:17,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:17,769 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) [2021-08-06 15:12:17,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 15:12:19,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:12:19,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:19,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:19,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:20,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711256355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:20,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:20,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:12:20,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190598237] [2021-08-06 15:12:20,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:12:20,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:20,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:12:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:12:20,852 INFO L87 Difference]: Start difference. First operand 532 states and 2029 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:21,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:21,041 INFO L93 Difference]: Finished difference Result 559 states and 2084 transitions. [2021-08-06 15:12:21,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:12:21,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:12:21,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:21,043 INFO L225 Difference]: With dead ends: 559 [2021-08-06 15:12:21,043 INFO L226 Difference]: Without dead ends: 551 [2021-08-06 15:12:21,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:12:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-08-06 15:12:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 530. [2021-08-06 15:12:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.8071833648393194) internal successors, (2014), 529 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 2014 transitions. [2021-08-06 15:12:21,050 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 2014 transitions. Word has length 24 [2021-08-06 15:12:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:21,050 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 2014 transitions. [2021-08-06 15:12:21,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 2014 transitions. [2021-08-06 15:12:21,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:21,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:21,051 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:21,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 15:12:21,251 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,SelfDestructingSolverStorable61 [2021-08-06 15:12:21,252 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:21,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:21,252 INFO L82 PathProgramCache]: Analyzing trace with hash -666469811, now seen corresponding path program 24 times [2021-08-06 15:12:21,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:21,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98525128] [2021-08-06 15:12:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:21,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:21,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:21,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98525128] [2021-08-06 15:12:21,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98525128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:21,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109251639] [2021-08-06 15:12:21,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:12:21,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:21,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:21,558 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) [2021-08-06 15:12:21,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 15:12:23,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:12:23,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:23,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:12:23,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:24,415 INFO L388 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 7 treesize of output 3 [2021-08-06 15:12:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:24,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109251639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:24,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:24,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:12:24,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722181946] [2021-08-06 15:12:24,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:12:24,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:24,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:12:24,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:12:24,584 INFO L87 Difference]: Start difference. First operand 530 states and 2014 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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) [2021-08-06 15:12:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:24,884 INFO L93 Difference]: Finished difference Result 628 states and 2279 transitions. [2021-08-06 15:12:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:12:24,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-08-06 15:12:24,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:24,885 INFO L225 Difference]: With dead ends: 628 [2021-08-06 15:12:24,885 INFO L226 Difference]: Without dead ends: 615 [2021-08-06 15:12:24,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:12:24,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-06 15:12:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 534. [2021-08-06 15:12:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.8123827392120075) internal successors, (2032), 533 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 2032 transitions. [2021-08-06 15:12:24,893 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 2032 transitions. Word has length 24 [2021-08-06 15:12:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:24,893 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 2032 transitions. [2021-08-06 15:12:24,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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) [2021-08-06 15:12:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 2032 transitions. [2021-08-06 15:12:24,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:24,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:24,894 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:24,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 15:12:25,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:25,095 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:25,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:25,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1460972761, now seen corresponding path program 25 times [2021-08-06 15:12:25,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:25,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512516363] [2021-08-06 15:12:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:25,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:25,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:25,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512516363] [2021-08-06 15:12:25,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512516363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:25,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47255594] [2021-08-06 15:12:25,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:12:25,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:25,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:25,331 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) [2021-08-06 15:12:25,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 15:12:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:27,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:12:27,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:28,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47255594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:28,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:28,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:12:28,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659665920] [2021-08-06 15:12:28,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:12:28,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:28,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:12:28,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:12:28,457 INFO L87 Difference]: Start difference. First operand 534 states and 2032 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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) [2021-08-06 15:12:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:28,781 INFO L93 Difference]: Finished difference Result 569 states and 2107 transitions. [2021-08-06 15:12:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:12:28,781 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 24 [2021-08-06 15:12:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:28,782 INFO L225 Difference]: With dead ends: 569 [2021-08-06 15:12:28,783 INFO L226 Difference]: Without dead ends: 559 [2021-08-06 15:12:28,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 486.8ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:12:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-06 15:12:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 528. [2021-08-06 15:12:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.8007590132827325) internal successors, (2003), 527 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 2003 transitions. [2021-08-06 15:12:28,790 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 2003 transitions. Word has length 24 [2021-08-06 15:12:28,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:28,790 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 2003 transitions. [2021-08-06 15:12:28,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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) [2021-08-06 15:12:28,790 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 2003 transitions. [2021-08-06 15:12:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:28,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:28,792 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:28,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:28,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:28,992 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1372971957, now seen corresponding path program 26 times [2021-08-06 15:12:28,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:28,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042358753] [2021-08-06 15:12:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:28,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:29,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:29,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042358753] [2021-08-06 15:12:29,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042358753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:29,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717430206] [2021-08-06 15:12:29,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:29,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:29,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:29,345 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) [2021-08-06 15:12:29,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 15:12:31,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:31,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:31,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:31,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:32,297 INFO L388 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 7 treesize of output 3 [2021-08-06 15:12:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:32,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717430206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:32,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:32,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:12:32,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478962661] [2021-08-06 15:12:32,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:12:32,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:32,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:12:32,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:12:32,425 INFO L87 Difference]: Start difference. First operand 528 states and 2003 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-06 15:12:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:32,930 INFO L93 Difference]: Finished difference Result 612 states and 2225 transitions. [2021-08-06 15:12:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:12:32,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 24 [2021-08-06 15:12:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:32,931 INFO L225 Difference]: With dead ends: 612 [2021-08-06 15:12:32,931 INFO L226 Difference]: Without dead ends: 597 [2021-08-06 15:12:32,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 738.3ms TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:12:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-08-06 15:12:32,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 528. [2021-08-06 15:12:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.8007590132827325) internal successors, (2003), 527 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 2003 transitions. [2021-08-06 15:12:32,939 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 2003 transitions. Word has length 24 [2021-08-06 15:12:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:32,939 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 2003 transitions. [2021-08-06 15:12:32,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-06 15:12:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 2003 transitions. [2021-08-06 15:12:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:32,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:32,940 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:32,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:33,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 15:12:33,149 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:33,150 INFO L82 PathProgramCache]: Analyzing trace with hash 662509735, now seen corresponding path program 27 times [2021-08-06 15:12:33,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:33,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172058116] [2021-08-06 15:12:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:33,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:33,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:33,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172058116] [2021-08-06 15:12:33,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172058116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:33,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207132790] [2021-08-06 15:12:33,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:33,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:33,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:33,349 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) [2021-08-06 15:12:33,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 15:12:35,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 15:12:35,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:35,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:35,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:36,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207132790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:36,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:36,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:12:36,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122225985] [2021-08-06 15:12:36,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:12:36,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:36,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:12:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:12:36,757 INFO L87 Difference]: Start difference. First operand 528 states and 2003 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:37,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:37,101 INFO L93 Difference]: Finished difference Result 577 states and 2117 transitions. [2021-08-06 15:12:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:12:37,101 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:12:37,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:37,103 INFO L225 Difference]: With dead ends: 577 [2021-08-06 15:12:37,103 INFO L226 Difference]: Without dead ends: 555 [2021-08-06 15:12:37,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:12:37,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-08-06 15:12:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 532. [2021-08-06 15:12:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 3.7796610169491527) internal successors, (2007), 531 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 2007 transitions. [2021-08-06 15:12:37,111 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 2007 transitions. Word has length 24 [2021-08-06 15:12:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:37,111 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 2007 transitions. [2021-08-06 15:12:37,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 2007 transitions. [2021-08-06 15:12:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:37,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:37,112 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:37,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-06 15:12:37,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 15:12:37,312 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:37,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:37,313 INFO L82 PathProgramCache]: Analyzing trace with hash -935216239, now seen corresponding path program 28 times [2021-08-06 15:12:37,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:37,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926126589] [2021-08-06 15:12:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:37,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:37,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:37,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926126589] [2021-08-06 15:12:37,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926126589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:37,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377827093] [2021-08-06 15:12:37,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:12:37,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:37,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:37,617 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) [2021-08-06 15:12:37,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 15:12:40,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:12:40,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:40,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:12:40,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:40,722 INFO L388 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 7 treesize of output 3 [2021-08-06 15:12:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:40,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377827093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:40,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:40,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:12:40,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321871842] [2021-08-06 15:12:40,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:12:40,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:40,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:12:40,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:12:40,888 INFO L87 Difference]: Start difference. First operand 532 states and 2007 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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) [2021-08-06 15:12:41,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:41,167 INFO L93 Difference]: Finished difference Result 581 states and 2138 transitions. [2021-08-06 15:12:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:12:41,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-08-06 15:12:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:41,168 INFO L225 Difference]: With dead ends: 581 [2021-08-06 15:12:41,168 INFO L226 Difference]: Without dead ends: 568 [2021-08-06 15:12:41,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:12:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-08-06 15:12:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 528. [2021-08-06 15:12:41,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.7855787476280836) internal successors, (1995), 527 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1995 transitions. [2021-08-06 15:12:41,176 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1995 transitions. Word has length 24 [2021-08-06 15:12:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:41,176 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1995 transitions. [2021-08-06 15:12:41,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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) [2021-08-06 15:12:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1995 transitions. [2021-08-06 15:12:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:41,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:41,177 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:41,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 15:12:41,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:41,378 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:41,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1383987727, now seen corresponding path program 29 times [2021-08-06 15:12:41,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:41,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190873069] [2021-08-06 15:12:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:41,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:41,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:41,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190873069] [2021-08-06 15:12:41,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190873069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:41,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933343015] [2021-08-06 15:12:41,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:12:41,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:41,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:41,685 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) [2021-08-06 15:12:41,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 15:12:44,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:12:44,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:44,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:12:44,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:45,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933343015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:45,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:45,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:12:45,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982776503] [2021-08-06 15:12:45,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:12:45,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:45,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:12:45,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:12:45,005 INFO L87 Difference]: Start difference. First operand 528 states and 1995 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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) [2021-08-06 15:12:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:45,351 INFO L93 Difference]: Finished difference Result 589 states and 2144 transitions. [2021-08-06 15:12:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:12:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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 24 [2021-08-06 15:12:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:45,352 INFO L225 Difference]: With dead ends: 589 [2021-08-06 15:12:45,352 INFO L226 Difference]: Without dead ends: 566 [2021-08-06 15:12:45,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 562.0ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:12:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-06 15:12:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 524. [2021-08-06 15:12:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.791586998087954) internal successors, (1983), 523 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1983 transitions. [2021-08-06 15:12:45,360 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1983 transitions. Word has length 24 [2021-08-06 15:12:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:45,360 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1983 transitions. [2021-08-06 15:12:45,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 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) [2021-08-06 15:12:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1983 transitions. [2021-08-06 15:12:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:45,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:45,361 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:45,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:45,562 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,SelfDestructingSolverStorable67 [2021-08-06 15:12:45,562 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:45,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1641718385, now seen corresponding path program 30 times [2021-08-06 15:12:45,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:45,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508889850] [2021-08-06 15:12:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:45,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:45,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:45,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508889850] [2021-08-06 15:12:45,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508889850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:45,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020824599] [2021-08-06 15:12:45,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:12:45,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:45,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:45,851 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) [2021-08-06 15:12:45,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 15:12:48,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:12:48,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:48,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:49,027 INFO L388 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 7 treesize of output 3 [2021-08-06 15:12:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:49,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020824599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:49,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:49,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:12:49,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549279912] [2021-08-06 15:12:49,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:12:49,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:49,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:12:49,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:12:49,157 INFO L87 Difference]: Start difference. First operand 524 states and 1983 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-06 15:12:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:49,602 INFO L93 Difference]: Finished difference Result 580 states and 2128 transitions. [2021-08-06 15:12:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:12:49,602 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 24 [2021-08-06 15:12:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:49,603 INFO L225 Difference]: With dead ends: 580 [2021-08-06 15:12:49,603 INFO L226 Difference]: Without dead ends: 565 [2021-08-06 15:12:49,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 587.9ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:12:49,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-08-06 15:12:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 520. [2021-08-06 15:12:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 3.7976878612716765) internal successors, (1971), 519 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1971 transitions. [2021-08-06 15:12:49,610 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1971 transitions. Word has length 24 [2021-08-06 15:12:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:49,611 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1971 transitions. [2021-08-06 15:12:49,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-06 15:12:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1971 transitions. [2021-08-06 15:12:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:49,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:49,612 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:49,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:49,812 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,SelfDestructingSolverStorable68 [2021-08-06 15:12:49,812 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2058359765, now seen corresponding path program 31 times [2021-08-06 15:12:49,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:49,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851384818] [2021-08-06 15:12:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:49,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:50,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:50,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851384818] [2021-08-06 15:12:50,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851384818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:50,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357301207] [2021-08-06 15:12:50,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:12:50,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:50,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:50,056 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) [2021-08-06 15:12:50,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 15:12:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:52,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:12:52,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:53,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357301207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:53,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:53,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:12:53,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075404458] [2021-08-06 15:12:53,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:12:53,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:12:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:12:53,428 INFO L87 Difference]: Start difference. First operand 520 states and 1971 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2021-08-06 15:12:53,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:53,590 INFO L93 Difference]: Finished difference Result 609 states and 2222 transitions. [2021-08-06 15:12:53,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:12:53,591 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 24 [2021-08-06 15:12:53,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:53,592 INFO L225 Difference]: With dead ends: 609 [2021-08-06 15:12:53,592 INFO L226 Difference]: Without dead ends: 581 [2021-08-06 15:12:53,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:12:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-08-06 15:12:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 524. [2021-08-06 15:12:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.7762906309751436) internal successors, (1975), 523 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1975 transitions. [2021-08-06 15:12:53,601 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1975 transitions. Word has length 24 [2021-08-06 15:12:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:53,601 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1975 transitions. [2021-08-06 15:12:53,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2021-08-06 15:12:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1975 transitions. [2021-08-06 15:12:53,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:53,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:53,603 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:53,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:53,828 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,SelfDestructingSolverStorable69 [2021-08-06 15:12:53,829 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:53,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1895864987, now seen corresponding path program 32 times [2021-08-06 15:12:53,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:53,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193559675] [2021-08-06 15:12:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:53,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:54,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:54,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193559675] [2021-08-06 15:12:54,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193559675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:54,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720693110] [2021-08-06 15:12:54,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:54,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:54,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:54,094 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) [2021-08-06 15:12:54,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 15:12:56,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:56,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:12:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:57,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720693110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:57,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:57,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:12:57,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314336389] [2021-08-06 15:12:57,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:12:57,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:12:57,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:12:57,699 INFO L87 Difference]: Start difference. First operand 524 states and 1975 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-08-06 15:12:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:58,017 INFO L93 Difference]: Finished difference Result 540 states and 2003 transitions. [2021-08-06 15:12:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:12:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 24 [2021-08-06 15:12:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:58,018 INFO L225 Difference]: With dead ends: 540 [2021-08-06 15:12:58,018 INFO L226 Difference]: Without dead ends: 536 [2021-08-06 15:12:58,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 570.9ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:12:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-08-06 15:12:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2021-08-06 15:12:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.7658349328214973) internal successors, (1962), 521 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1962 transitions. [2021-08-06 15:12:58,032 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1962 transitions. Word has length 24 [2021-08-06 15:12:58,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:58,032 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1962 transitions. [2021-08-06 15:12:58,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-08-06 15:12:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1962 transitions. [2021-08-06 15:12:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:58,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:58,033 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:58,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:58,233 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,SelfDestructingSolverStorable70 [2021-08-06 15:12:58,234 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:12:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:58,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2066029621, now seen corresponding path program 33 times [2021-08-06 15:12:58,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:58,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132918823] [2021-08-06 15:12:58,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:58,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:58,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:58,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132918823] [2021-08-06 15:12:58,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132918823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:58,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750421944] [2021-08-06 15:12:58,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:58,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:58,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:58,488 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) [2021-08-06 15:12:58,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 15:13:01,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:13:01,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:01,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:13:01,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:02,001 INFO L388 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 7 treesize of output 3 [2021-08-06 15:13:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:02,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750421944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:02,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:02,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:13:02,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65630113] [2021-08-06 15:13:02,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:13:02,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:02,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:13:02,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:13:02,133 INFO L87 Difference]: Start difference. First operand 522 states and 1962 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-06 15:13:02,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:02,450 INFO L93 Difference]: Finished difference Result 581 states and 2122 transitions. [2021-08-06 15:13:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:13:02,451 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 24 [2021-08-06 15:13:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:02,452 INFO L225 Difference]: With dead ends: 581 [2021-08-06 15:13:02,452 INFO L226 Difference]: Without dead ends: 566 [2021-08-06 15:13:02,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 503.1ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:13:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-06 15:13:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 526. [2021-08-06 15:13:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 3.775238095238095) internal successors, (1982), 525 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1982 transitions. [2021-08-06 15:13:02,459 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1982 transitions. Word has length 24 [2021-08-06 15:13:02,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:02,459 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1982 transitions. [2021-08-06 15:13:02,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-06 15:13:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1982 transitions. [2021-08-06 15:13:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:13:02,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:02,460 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:02,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:02,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:02,662 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1554130857, now seen corresponding path program 34 times [2021-08-06 15:13:02,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:02,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465848979] [2021-08-06 15:13:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:02,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:02,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:02,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465848979] [2021-08-06 15:13:02,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465848979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:02,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351114231] [2021-08-06 15:13:02,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:13:02,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:02,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:02,877 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) [2021-08-06 15:13:02,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 15:13:05,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:13:05,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:05,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:13:05,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:06,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351114231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:06,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:06,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:13:06,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726844188] [2021-08-06 15:13:06,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:13:06,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:06,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:13:06,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:13:06,534 INFO L87 Difference]: Start difference. First operand 526 states and 1982 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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) [2021-08-06 15:13:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:06,734 INFO L93 Difference]: Finished difference Result 542 states and 2010 transitions. [2021-08-06 15:13:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:13:06,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 24 [2021-08-06 15:13:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:06,735 INFO L225 Difference]: With dead ends: 542 [2021-08-06 15:13:06,735 INFO L226 Difference]: Without dead ends: 534 [2021-08-06 15:13:06,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:13:06,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-06 15:13:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 520. [2021-08-06 15:13:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 3.7630057803468207) internal successors, (1953), 519 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1953 transitions. [2021-08-06 15:13:06,742 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1953 transitions. Word has length 24 [2021-08-06 15:13:06,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:06,742 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1953 transitions. [2021-08-06 15:13:06,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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) [2021-08-06 15:13:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1953 transitions. [2021-08-06 15:13:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:13:06,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:06,743 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:06,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:06,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:06,945 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1826518341, now seen corresponding path program 35 times [2021-08-06 15:13:06,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:06,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087411801] [2021-08-06 15:13:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:06,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:07,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:07,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087411801] [2021-08-06 15:13:07,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087411801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:07,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359691467] [2021-08-06 15:13:07,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:13:07,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:07,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:07,239 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) [2021-08-06 15:13:07,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 15:13:09,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:13:09,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:09,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:13:09,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:11,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359691467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:11,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:11,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:13:11,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277608616] [2021-08-06 15:13:11,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:13:11,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:11,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:13:11,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:13:11,062 INFO L87 Difference]: Start difference. First operand 520 states and 1953 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:11,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:11,352 INFO L93 Difference]: Finished difference Result 603 states and 2156 transitions. [2021-08-06 15:13:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:13:11,355 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:13:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:11,356 INFO L225 Difference]: With dead ends: 603 [2021-08-06 15:13:11,356 INFO L226 Difference]: Without dead ends: 585 [2021-08-06 15:13:11,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 452.6ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:13:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-08-06 15:13:11,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 525. [2021-08-06 15:13:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.734732824427481) internal successors, (1957), 524 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1957 transitions. [2021-08-06 15:13:11,363 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1957 transitions. Word has length 24 [2021-08-06 15:13:11,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:11,364 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1957 transitions. [2021-08-06 15:13:11,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:11,364 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1957 transitions. [2021-08-06 15:13:11,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:13:11,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:11,365 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:11,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 15:13:11,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:11,565 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:11,565 INFO L82 PathProgramCache]: Analyzing trace with hash -446817847, now seen corresponding path program 36 times [2021-08-06 15:13:11,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:11,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532449572] [2021-08-06 15:13:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:11,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:13:11,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:11,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532449572] [2021-08-06 15:13:11,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532449572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:11,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212503101] [2021-08-06 15:13:11,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:13:11,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:11,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:11,730 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) [2021-08-06 15:13:11,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 15:13:14,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:13:14,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:14,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:13:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:15,140 INFO L388 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 7 treesize of output 3 [2021-08-06 15:13:15,144 INFO L388 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 7 treesize of output 3 [2021-08-06 15:13:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:13:15,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212503101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:15,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:15,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 15:13:15,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476983988] [2021-08-06 15:13:15,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:13:15,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:15,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:13:15,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:13:15,289 INFO L87 Difference]: Start difference. First operand 525 states and 1957 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-08-06 15:13:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:15,481 INFO L93 Difference]: Finished difference Result 684 states and 2448 transitions. [2021-08-06 15:13:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:13:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:13:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:15,482 INFO L225 Difference]: With dead ends: 684 [2021-08-06 15:13:15,482 INFO L226 Difference]: Without dead ends: 680 [2021-08-06 15:13:15,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:13:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-08-06 15:13:15,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 542. [2021-08-06 15:13:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.7541589648798523) internal successors, (2031), 541 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 2031 transitions. [2021-08-06 15:13:15,490 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 2031 transitions. Word has length 24 [2021-08-06 15:13:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:15,491 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 2031 transitions. [2021-08-06 15:13:15,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-08-06 15:13:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 2031 transitions. [2021-08-06 15:13:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:13:15,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:15,492 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:15,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:15,696 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,SelfDestructingSolverStorable74 [2021-08-06 15:13:15,697 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:15,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:15,697 INFO L82 PathProgramCache]: Analyzing trace with hash 121700513, now seen corresponding path program 37 times [2021-08-06 15:13:15,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:15,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412340346] [2021-08-06 15:13:15,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:15,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:15,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:15,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412340346] [2021-08-06 15:13:15,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412340346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:15,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369296874] [2021-08-06 15:13:15,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:13:15,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:15,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:15,836 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) [2021-08-06 15:13:15,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 15:13:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:18,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:13:18,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:19,256 INFO L388 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 7 treesize of output 3 [2021-08-06 15:13:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:19,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369296874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:19,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:19,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-08-06 15:13:19,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636814091] [2021-08-06 15:13:19,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:13:19,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:13:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:13:19,413 INFO L87 Difference]: Start difference. First operand 542 states and 2031 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-08-06 15:13:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:19,680 INFO L93 Difference]: Finished difference Result 622 states and 2035 transitions. [2021-08-06 15:13:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:13:19,680 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 24 [2021-08-06 15:13:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:19,681 INFO L225 Difference]: With dead ends: 622 [2021-08-06 15:13:19,681 INFO L226 Difference]: Without dead ends: 604 [2021-08-06 15:13:19,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 354.7ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:13:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-06 15:13:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 416. [2021-08-06 15:13:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.503614457831325) internal successors, (1454), 415 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1454 transitions. [2021-08-06 15:13:19,689 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1454 transitions. Word has length 24 [2021-08-06 15:13:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:19,689 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1454 transitions. [2021-08-06 15:13:19,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-08-06 15:13:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1454 transitions. [2021-08-06 15:13:19,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:13:19,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:19,690 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:19,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 15:13:19,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:19,905 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:19,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:19,905 INFO L82 PathProgramCache]: Analyzing trace with hash -785514553, now seen corresponding path program 38 times [2021-08-06 15:13:19,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:19,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257095953] [2021-08-06 15:13:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:19,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:20,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:20,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257095953] [2021-08-06 15:13:20,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257095953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:20,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605230719] [2021-08-06 15:13:20,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:13:20,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:20,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:20,191 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) [2021-08-06 15:13:20,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 15:13:23,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:13:23,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:13:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:24,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605230719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:24,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:24,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:13:24,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34567982] [2021-08-06 15:13:24,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:13:24,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:24,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:13:24,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:13:24,015 INFO L87 Difference]: Start difference. First operand 416 states and 1454 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-08-06 15:13:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:24,508 INFO L93 Difference]: Finished difference Result 473 states and 1590 transitions. [2021-08-06 15:13:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:13:24,509 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 24 [2021-08-06 15:13:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:24,510 INFO L225 Difference]: With dead ends: 473 [2021-08-06 15:13:24,510 INFO L226 Difference]: Without dead ends: 469 [2021-08-06 15:13:24,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 698.2ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:13:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-06 15:13:24,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 413. [2021-08-06 15:13:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.4902912621359223) internal successors, (1438), 412 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1438 transitions. [2021-08-06 15:13:24,516 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1438 transitions. Word has length 24 [2021-08-06 15:13:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:24,516 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1438 transitions. [2021-08-06 15:13:24,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-08-06 15:13:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1438 transitions. [2021-08-06 15:13:24,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:13:24,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:24,517 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:24,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 15:13:24,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:24,738 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:24,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:24,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1069084635, now seen corresponding path program 39 times [2021-08-06 15:13:24,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:24,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421567872] [2021-08-06 15:13:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:24,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:24,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:24,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421567872] [2021-08-06 15:13:24,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421567872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:24,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407843232] [2021-08-06 15:13:24,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:13:24,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:24,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:24,989 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) [2021-08-06 15:13:24,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 15:13:27,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:13:27,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:27,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:13:27,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:28,889 INFO L388 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 7 treesize of output 3 [2021-08-06 15:13:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:29,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407843232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:29,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:29,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:13:29,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698165398] [2021-08-06 15:13:29,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:13:29,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:29,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:13:29,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:13:29,030 INFO L87 Difference]: Start difference. First operand 413 states and 1438 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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) [2021-08-06 15:13:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:29,555 INFO L93 Difference]: Finished difference Result 597 states and 2002 transitions. [2021-08-06 15:13:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:13:29,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-08-06 15:13:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:29,557 INFO L225 Difference]: With dead ends: 597 [2021-08-06 15:13:29,557 INFO L226 Difference]: Without dead ends: 553 [2021-08-06 15:13:29,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 685.8ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:13:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-08-06 15:13:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 440. [2021-08-06 15:13:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.5330296127562644) internal successors, (1551), 439 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1551 transitions. [2021-08-06 15:13:29,563 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1551 transitions. Word has length 24 [2021-08-06 15:13:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:29,563 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1551 transitions. [2021-08-06 15:13:29,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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) [2021-08-06 15:13:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1551 transitions. [2021-08-06 15:13:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:13:29,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:29,564 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:29,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 15:13:29,764 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,SelfDestructingSolverStorable77 [2021-08-06 15:13:29,764 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:29,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2093798559, now seen corresponding path program 40 times [2021-08-06 15:13:29,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:29,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793455461] [2021-08-06 15:13:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:29,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:29,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:29,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793455461] [2021-08-06 15:13:29,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793455461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:29,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536260980] [2021-08-06 15:13:29,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:13:29,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:29,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:29,990 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) [2021-08-06 15:13:29,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 15:13:33,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:13:33,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:33,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:13:33,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:33,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536260980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:33,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:33,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:13:33,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917920883] [2021-08-06 15:13:33,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:13:33,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:13:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:13:33,869 INFO L87 Difference]: Start difference. First operand 440 states and 1551 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:34,235 INFO L93 Difference]: Finished difference Result 462 states and 1596 transitions. [2021-08-06 15:13:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:13:34,236 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:13:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:34,237 INFO L225 Difference]: With dead ends: 462 [2021-08-06 15:13:34,237 INFO L226 Difference]: Without dead ends: 454 [2021-08-06 15:13:34,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 552.2ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:13:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-06 15:13:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 440. [2021-08-06 15:13:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.5056947608200457) internal successors, (1539), 439 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1539 transitions. [2021-08-06 15:13:34,253 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1539 transitions. Word has length 24 [2021-08-06 15:13:34,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:34,253 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1539 transitions. [2021-08-06 15:13:34,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1539 transitions. [2021-08-06 15:13:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:13:34,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:34,254 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:34,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:34,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 15:13:34,454 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:34,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:34,455 INFO L82 PathProgramCache]: Analyzing trace with hash -407674487, now seen corresponding path program 41 times [2021-08-06 15:13:34,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:34,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41533357] [2021-08-06 15:13:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:34,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:34,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:34,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41533357] [2021-08-06 15:13:34,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41533357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:34,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402898286] [2021-08-06 15:13:34,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:13:34,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:34,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:34,736 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) [2021-08-06 15:13:34,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 15:13:37,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:13:37,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:37,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:13:37,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:38,474 INFO L388 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 7 treesize of output 3 [2021-08-06 15:13:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:38,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402898286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:38,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:38,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:13:38,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854120653] [2021-08-06 15:13:38,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:13:38,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:13:38,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:13:38,637 INFO L87 Difference]: Start difference. First operand 440 states and 1539 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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) [2021-08-06 15:13:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:39,244 INFO L93 Difference]: Finished difference Result 784 states and 2604 transitions. [2021-08-06 15:13:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:13:39,245 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-08-06 15:13:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:39,247 INFO L225 Difference]: With dead ends: 784 [2021-08-06 15:13:39,247 INFO L226 Difference]: Without dead ends: 718 [2021-08-06 15:13:39,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 712.0ms TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:13:39,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-08-06 15:13:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 482. [2021-08-06 15:13:39,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.6735966735966734) internal successors, (1767), 481 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1767 transitions. [2021-08-06 15:13:39,258 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1767 transitions. Word has length 24 [2021-08-06 15:13:39,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:39,258 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1767 transitions. [2021-08-06 15:13:39,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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) [2021-08-06 15:13:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1767 transitions. [2021-08-06 15:13:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:13:39,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:39,259 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:39,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:39,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:39,477 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1114176633, now seen corresponding path program 42 times [2021-08-06 15:13:39,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:39,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86456881] [2021-08-06 15:13:39,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:39,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:39,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:39,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86456881] [2021-08-06 15:13:39,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86456881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:39,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031605252] [2021-08-06 15:13:39,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:13:39,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:39,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:39,731 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) [2021-08-06 15:13:39,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 15:13:42,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:13:42,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:42,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:13:42,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:43,610 INFO L388 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 7 treesize of output 3 [2021-08-06 15:13:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:43,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031605252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:43,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:43,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:13:43,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872129883] [2021-08-06 15:13:43,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:13:43,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:43,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:13:43,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:13:43,742 INFO L87 Difference]: Start difference. First operand 482 states and 1767 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-06 15:13:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:44,171 INFO L93 Difference]: Finished difference Result 531 states and 1896 transitions. [2021-08-06 15:13:44,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:13:44,171 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 24 [2021-08-06 15:13:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:44,172 INFO L225 Difference]: With dead ends: 531 [2021-08-06 15:13:44,172 INFO L226 Difference]: Without dead ends: 516 [2021-08-06 15:13:44,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 637.5ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:13:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-08-06 15:13:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 474. [2021-08-06 15:13:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.684989429175476) internal successors, (1743), 473 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1743 transitions. [2021-08-06 15:13:44,179 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1743 transitions. Word has length 24 [2021-08-06 15:13:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:44,179 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1743 transitions. [2021-08-06 15:13:44,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-06 15:13:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1743 transitions. [2021-08-06 15:13:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:13:44,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:44,180 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:44,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 15:13:44,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:44,380 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash -715564275, now seen corresponding path program 43 times [2021-08-06 15:13:44,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:44,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832127326] [2021-08-06 15:13:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:44,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:13:44,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:44,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832127326] [2021-08-06 15:13:44,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832127326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:44,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027703957] [2021-08-06 15:13:44,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:13:44,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:44,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:44,512 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) [2021-08-06 15:13:44,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 15:13:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:47,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:13:47,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:48,121 INFO L388 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 7 treesize of output 3 [2021-08-06 15:13:48,136 INFO L388 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 7 treesize of output 3 [2021-08-06 15:13:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:13:48,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027703957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:48,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:48,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 15:13:48,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192925675] [2021-08-06 15:13:48,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:13:48,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:48,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:13:48,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:13:48,269 INFO L87 Difference]: Start difference. First operand 474 states and 1743 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-08-06 15:13:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:48,318 INFO L93 Difference]: Finished difference Result 460 states and 1510 transitions. [2021-08-06 15:13:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:13:48,318 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 24 [2021-08-06 15:13:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:48,319 INFO L225 Difference]: With dead ends: 460 [2021-08-06 15:13:48,319 INFO L226 Difference]: Without dead ends: 444 [2021-08-06 15:13:48,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:13:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-06 15:13:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 377. [2021-08-06 15:13:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.4122340425531914) internal successors, (1283), 376 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1283 transitions. [2021-08-06 15:13:48,324 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1283 transitions. Word has length 24 [2021-08-06 15:13:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:48,324 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1283 transitions. [2021-08-06 15:13:48,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-08-06 15:13:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1283 transitions. [2021-08-06 15:13:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:13:48,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:48,325 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:48,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:48,525 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,SelfDestructingSolverStorable81 [2021-08-06 15:13:48,525 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:48,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:48,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1054260981, now seen corresponding path program 44 times [2021-08-06 15:13:48,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:48,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833214278] [2021-08-06 15:13:48,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:48,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:48,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:48,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833214278] [2021-08-06 15:13:48,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833214278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:48,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229553429] [2021-08-06 15:13:48,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:13:48,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:48,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:48,802 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) [2021-08-06 15:13:48,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 15:13:51,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:13:51,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:51,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:13:51,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:52,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229553429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:52,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:52,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:13:52,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730276333] [2021-08-06 15:13:52,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:13:52,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:13:52,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:13:52,854 INFO L87 Difference]: Start difference. First operand 377 states and 1283 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-08-06 15:13:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:53,078 INFO L93 Difference]: Finished difference Result 405 states and 1341 transitions. [2021-08-06 15:13:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:13:53,078 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 24 [2021-08-06 15:13:53,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:53,079 INFO L225 Difference]: With dead ends: 405 [2021-08-06 15:13:53,079 INFO L226 Difference]: Without dead ends: 401 [2021-08-06 15:13:53,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:13:53,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-06 15:13:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 369. [2021-08-06 15:13:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.3994565217391304) internal successors, (1251), 368 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1251 transitions. [2021-08-06 15:13:53,084 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1251 transitions. Word has length 24 [2021-08-06 15:13:53,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:53,084 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1251 transitions. [2021-08-06 15:13:53,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-08-06 15:13:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1251 transitions. [2021-08-06 15:13:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:13:53,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:53,085 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:53,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:53,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:53,288 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:53,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1932422309, now seen corresponding path program 45 times [2021-08-06 15:13:53,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:53,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464143487] [2021-08-06 15:13:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:53,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:53,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:53,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464143487] [2021-08-06 15:13:53,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464143487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:53,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442909859] [2021-08-06 15:13:53,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:13:53,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:53,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:53,514 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) [2021-08-06 15:13:53,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 15:13:56,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:13:56,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:56,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:13:56,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:57,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442909859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:57,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:57,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:13:57,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408861787] [2021-08-06 15:13:57,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:13:57,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:57,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:13:57,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:13:57,870 INFO L87 Difference]: Start difference. First operand 369 states and 1251 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:58,138 INFO L93 Difference]: Finished difference Result 391 states and 1296 transitions. [2021-08-06 15:13:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:13:58,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:13:58,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:58,139 INFO L225 Difference]: With dead ends: 391 [2021-08-06 15:13:58,139 INFO L226 Difference]: Without dead ends: 383 [2021-08-06 15:13:58,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 420.9ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:13:58,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-08-06 15:13:58,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 359. [2021-08-06 15:13:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.3910614525139664) internal successors, (1214), 358 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1214 transitions. [2021-08-06 15:13:58,144 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1214 transitions. Word has length 24 [2021-08-06 15:13:58,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:58,144 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1214 transitions. [2021-08-06 15:13:58,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1214 transitions. [2021-08-06 15:13:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:13:58,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:58,145 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:58,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:58,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:58,345 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:13:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1679146634, now seen corresponding path program 46 times [2021-08-06 15:13:58,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:58,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325513723] [2021-08-06 15:13:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:58,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:13:58,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:58,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325513723] [2021-08-06 15:13:58,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325513723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:58,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567124494] [2021-08-06 15:13:58,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:13:58,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:58,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:58,541 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) [2021-08-06 15:13:58,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 15:14:01,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:14:01,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:01,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 15:14:01,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:02,288 INFO L388 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 7 treesize of output 3 [2021-08-06 15:14:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:14:02,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567124494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:02,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:02,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-06 15:14:02,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595832538] [2021-08-06 15:14:02,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:14:02,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:14:02,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:14:02,663 INFO L87 Difference]: Start difference. First operand 359 states and 1214 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-08-06 15:14:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:02,887 INFO L93 Difference]: Finished difference Result 544 states and 1760 transitions. [2021-08-06 15:14:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:14:02,888 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 25 [2021-08-06 15:14:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:02,888 INFO L225 Difference]: With dead ends: 544 [2021-08-06 15:14:02,889 INFO L226 Difference]: Without dead ends: 514 [2021-08-06 15:14:02,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:14:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-08-06 15:14:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 383. [2021-08-06 15:14:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.4293193717277486) internal successors, (1310), 382 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1310 transitions. [2021-08-06 15:14:02,895 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1310 transitions. Word has length 25 [2021-08-06 15:14:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:02,895 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1310 transitions. [2021-08-06 15:14:02,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-08-06 15:14:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1310 transitions. [2021-08-06 15:14:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:14:02,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:02,896 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:02,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 15:14:03,096 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,SelfDestructingSolverStorable84 [2021-08-06 15:14:03,097 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:14:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:03,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1434008750, now seen corresponding path program 47 times [2021-08-06 15:14:03,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:03,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321327821] [2021-08-06 15:14:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:03,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:03,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:03,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321327821] [2021-08-06 15:14:03,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321327821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:03,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026003119] [2021-08-06 15:14:03,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:14:03,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:03,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:03,371 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) [2021-08-06 15:14:03,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 15:14:06,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:14:06,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:06,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:14:06,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:07,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026003119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:07,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:07,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:14:07,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055596872] [2021-08-06 15:14:07,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:14:07,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:07,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:14:07,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:14:07,927 INFO L87 Difference]: Start difference. First operand 383 states and 1310 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:14:08,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:08,493 INFO L93 Difference]: Finished difference Result 452 states and 1524 transitions. [2021-08-06 15:14:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:14:08,494 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:14:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:08,494 INFO L225 Difference]: With dead ends: 452 [2021-08-06 15:14:08,495 INFO L226 Difference]: Without dead ends: 447 [2021-08-06 15:14:08,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 758.3ms TimeCoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:14:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-06 15:14:08,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 397. [2021-08-06 15:14:08,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.4722222222222223) internal successors, (1375), 396 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1375 transitions. [2021-08-06 15:14:08,500 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1375 transitions. Word has length 25 [2021-08-06 15:14:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:08,500 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1375 transitions. [2021-08-06 15:14:08,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:14:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1375 transitions. [2021-08-06 15:14:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:14:08,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:08,501 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:08,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:08,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:08,702 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:14:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:08,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2012161932, now seen corresponding path program 48 times [2021-08-06 15:14:08,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:08,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657844422] [2021-08-06 15:14:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:08,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:14:08,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:08,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657844422] [2021-08-06 15:14:08,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657844422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:08,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363556308] [2021-08-06 15:14:08,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:14:08,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:08,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:08,945 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) [2021-08-06 15:14:08,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 15:14:12,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:14:12,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:12,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:14:12,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:13,041 INFO L388 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 7 treesize of output 3 [2021-08-06 15:14:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:14:13,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363556308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:13,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:13,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 15:14:13,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201202251] [2021-08-06 15:14:13,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:14:13,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:13,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:14:13,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:14:13,862 INFO L87 Difference]: Start difference. First operand 397 states and 1375 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-08-06 15:14:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:14,165 INFO L93 Difference]: Finished difference Result 539 states and 1742 transitions. [2021-08-06 15:14:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:14:14,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-08-06 15:14:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:14,167 INFO L225 Difference]: With dead ends: 539 [2021-08-06 15:14:14,167 INFO L226 Difference]: Without dead ends: 499 [2021-08-06 15:14:14,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:14:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-06 15:14:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 391. [2021-08-06 15:14:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.482051282051282) internal successors, (1358), 390 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1358 transitions. [2021-08-06 15:14:14,172 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1358 transitions. Word has length 25 [2021-08-06 15:14:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:14,173 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1358 transitions. [2021-08-06 15:14:14,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-08-06 15:14:14,173 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1358 transitions. [2021-08-06 15:14:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:14:14,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:14,173 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:14,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:14,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:14,374 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:14:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:14,374 INFO L82 PathProgramCache]: Analyzing trace with hash 958860024, now seen corresponding path program 49 times [2021-08-06 15:14:14,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:14,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93288026] [2021-08-06 15:14:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:14,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:14,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:14,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93288026] [2021-08-06 15:14:14,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93288026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:14,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030875624] [2021-08-06 15:14:14,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:14:14,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:14,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:14,663 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) [2021-08-06 15:14:14,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 15:14:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:14:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:19,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030875624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:19,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:19,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:14:19,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976854133] [2021-08-06 15:14:19,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:14:19,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:14:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:14:19,220 INFO L87 Difference]: Start difference. First operand 391 states and 1358 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:14:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:19,826 INFO L93 Difference]: Finished difference Result 574 states and 1982 transitions. [2021-08-06 15:14:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:14:19,826 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:14:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:19,827 INFO L225 Difference]: With dead ends: 574 [2021-08-06 15:14:19,827 INFO L226 Difference]: Without dead ends: 553 [2021-08-06 15:14:19,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 752.9ms TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:14:19,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-08-06 15:14:19,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 435. [2021-08-06 15:14:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.5806451612903225) internal successors, (1554), 434 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1554 transitions. [2021-08-06 15:14:19,833 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1554 transitions. Word has length 25 [2021-08-06 15:14:19,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:19,834 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1554 transitions. [2021-08-06 15:14:19,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:14:19,834 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1554 transitions. [2021-08-06 15:14:19,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:14:19,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:19,834 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:19,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:20,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 15:14:20,035 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:14:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:20,035 INFO L82 PathProgramCache]: Analyzing trace with hash 73061744, now seen corresponding path program 50 times [2021-08-06 15:14:20,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:20,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732597785] [2021-08-06 15:14:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:20,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:20,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:20,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732597785] [2021-08-06 15:14:20,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732597785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:20,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704637352] [2021-08-06 15:14:20,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:14:20,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:20,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:20,304 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) [2021-08-06 15:14:20,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 15:14:23,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:14:23,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:23,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:14:23,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:24,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704637352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:24,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:24,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:14:24,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657764813] [2021-08-06 15:14:24,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:14:24,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:24,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:14:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:14:24,997 INFO L87 Difference]: Start difference. First operand 435 states and 1554 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:14:25,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:25,437 INFO L93 Difference]: Finished difference Result 482 states and 1707 transitions. [2021-08-06 15:14:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:14:25,438 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:14:25,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:25,438 INFO L225 Difference]: With dead ends: 482 [2021-08-06 15:14:25,438 INFO L226 Difference]: Without dead ends: 477 [2021-08-06 15:14:25,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 656.7ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:14:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-08-06 15:14:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 435. [2021-08-06 15:14:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.5806451612903225) internal successors, (1554), 434 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:25,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1554 transitions. [2021-08-06 15:14:25,444 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1554 transitions. Word has length 25 [2021-08-06 15:14:25,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:25,444 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1554 transitions. [2021-08-06 15:14:25,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:14:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1554 transitions. [2021-08-06 15:14:25,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:14:25,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:25,446 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:25,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:25,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:25,661 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:14:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash 476132468, now seen corresponding path program 51 times [2021-08-06 15:14:25,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:25,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466278056] [2021-08-06 15:14:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:25,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:25,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:25,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466278056] [2021-08-06 15:14:25,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466278056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:25,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991935578] [2021-08-06 15:14:25,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:14:25,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:25,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:25,961 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) [2021-08-06 15:14:25,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 15:14:29,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:14:29,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:29,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:14:29,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:30,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991935578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:30,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:30,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:14:30,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414121780] [2021-08-06 15:14:30,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:14:30,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:30,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:14:30,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:14:30,501 INFO L87 Difference]: Start difference. First operand 435 states and 1554 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:14:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:30,793 INFO L93 Difference]: Finished difference Result 484 states and 1712 transitions. [2021-08-06 15:14:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:14:30,793 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:14:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:30,794 INFO L225 Difference]: With dead ends: 484 [2021-08-06 15:14:30,794 INFO L226 Difference]: Without dead ends: 479 [2021-08-06 15:14:30,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 565.4ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:14:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-08-06 15:14:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 445. [2021-08-06 15:14:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.5563063063063063) internal successors, (1579), 444 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1579 transitions. [2021-08-06 15:14:30,799 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1579 transitions. Word has length 25 [2021-08-06 15:14:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:30,800 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1579 transitions. [2021-08-06 15:14:30,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:14:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1579 transitions. [2021-08-06 15:14:30,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:14:30,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:30,800 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:30,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:31,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:31,001 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:14:31,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:31,001 INFO L82 PathProgramCache]: Analyzing trace with hash -832151538, now seen corresponding path program 52 times [2021-08-06 15:14:31,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:31,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273185633] [2021-08-06 15:14:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:31,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:31,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:31,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273185633] [2021-08-06 15:14:31,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273185633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:31,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281590570] [2021-08-06 15:14:31,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:14:31,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:31,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:31,255 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) [2021-08-06 15:14:31,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 15:14:34,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:14:34,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:34,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:14:34,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:35,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281590570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:35,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:35,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:14:35,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887260802] [2021-08-06 15:14:35,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:14:35,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:35,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:14:35,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:14:35,998 INFO L87 Difference]: Start difference. First operand 445 states and 1579 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:14:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:36,343 INFO L93 Difference]: Finished difference Result 492 states and 1732 transitions. [2021-08-06 15:14:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:14:36,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:14:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:36,344 INFO L225 Difference]: With dead ends: 492 [2021-08-06 15:14:36,344 INFO L226 Difference]: Without dead ends: 487 [2021-08-06 15:14:36,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 590.2ms TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:14:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-08-06 15:14:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 445. [2021-08-06 15:14:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.5563063063063063) internal successors, (1579), 444 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1579 transitions. [2021-08-06 15:14:36,351 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1579 transitions. Word has length 25 [2021-08-06 15:14:36,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:36,351 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1579 transitions. [2021-08-06 15:14:36,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:14:36,351 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1579 transitions. [2021-08-06 15:14:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:14:36,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:36,352 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:36,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:36,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:36,552 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:14:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:36,552 INFO L82 PathProgramCache]: Analyzing trace with hash 765257294, now seen corresponding path program 53 times [2021-08-06 15:14:36,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:36,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512320049] [2021-08-06 15:14:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:36,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:36,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:36,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512320049] [2021-08-06 15:14:36,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512320049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:36,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592707563] [2021-08-06 15:14:36,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:14:36,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:36,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:36,781 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) [2021-08-06 15:14:36,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 15:14:40,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:14:40,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:40,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:14:40,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:41,030 INFO L388 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 7 treesize of output 3 [2021-08-06 15:14:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:14:41,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592707563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:41,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:41,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-08-06 15:14:41,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070655102] [2021-08-06 15:14:41,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:14:41,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:14:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:14:41,825 INFO L87 Difference]: Start difference. First operand 445 states and 1579 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:42,090 INFO L93 Difference]: Finished difference Result 527 states and 1784 transitions. [2021-08-06 15:14:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:14:42,090 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 15:14:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:42,091 INFO L225 Difference]: With dead ends: 527 [2021-08-06 15:14:42,091 INFO L226 Difference]: Without dead ends: 495 [2021-08-06 15:14:42,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 384.0ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:14:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-06 15:14:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 453. [2021-08-06 15:14:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.5376106194690267) internal successors, (1599), 452 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1599 transitions. [2021-08-06 15:14:42,098 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1599 transitions. Word has length 25 [2021-08-06 15:14:42,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:42,098 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1599 transitions. [2021-08-06 15:14:42,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:42,098 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1599 transitions. [2021-08-06 15:14:42,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:14:42,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:42,100 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:42,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:42,301 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,SelfDestructingSolverStorable91 [2021-08-06 15:14:42,301 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:14:42,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:42,301 INFO L82 PathProgramCache]: Analyzing trace with hash 904441036, now seen corresponding path program 54 times [2021-08-06 15:14:42,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:42,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11489280] [2021-08-06 15:14:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:42,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:42,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:42,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11489280] [2021-08-06 15:14:42,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11489280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:42,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379969512] [2021-08-06 15:14:42,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:14:42,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:42,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:42,571 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) [2021-08-06 15:14:42,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 15:14:46,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:14:46,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:46,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:14:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:47,370 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-08-06 15:14:47,370 INFO L388 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 71 treesize of output 46 [2021-08-06 15:14:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:47,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379969512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:47,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:47,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:14:47,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427228713] [2021-08-06 15:14:47,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:14:47,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:14:47,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:14:47,417 INFO L87 Difference]: Start difference. First operand 453 states and 1599 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:14:48,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:48,050 INFO L93 Difference]: Finished difference Result 764 states and 2632 transitions. [2021-08-06 15:14:48,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:14:48,051 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 25 [2021-08-06 15:14:48,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:48,052 INFO L225 Difference]: With dead ends: 764 [2021-08-06 15:14:48,052 INFO L226 Difference]: Without dead ends: 746 [2021-08-06 15:14:48,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 813.8ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:14:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-08-06 15:14:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 491. [2021-08-06 15:14:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.593877551020408) internal successors, (1761), 490 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1761 transitions. [2021-08-06 15:14:48,060 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1761 transitions. Word has length 25 [2021-08-06 15:14:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:48,060 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1761 transitions. [2021-08-06 15:14:48,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:14:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1761 transitions. [2021-08-06 15:14:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:14:48,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:48,061 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:48,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 15:14:48,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:48,274 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:14:48,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash 59469584, now seen corresponding path program 55 times [2021-08-06 15:14:48,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:48,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692675288] [2021-08-06 15:14:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:48,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:48,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:48,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692675288] [2021-08-06 15:14:48,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692675288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:48,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182681139] [2021-08-06 15:14:48,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:14:48,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:48,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:48,569 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) [2021-08-06 15:14:48,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 15:14:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:52,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:14:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:53,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182681139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:53,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:53,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:14:53,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320717538] [2021-08-06 15:14:53,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:14:53,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:53,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:14:53,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:14:53,475 INFO L87 Difference]: Start difference. First operand 491 states and 1761 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:14:53,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:53,823 INFO L93 Difference]: Finished difference Result 538 states and 1914 transitions. [2021-08-06 15:14:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:14:53,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 25 [2021-08-06 15:14:53,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:53,825 INFO L225 Difference]: With dead ends: 538 [2021-08-06 15:14:53,825 INFO L226 Difference]: Without dead ends: 533 [2021-08-06 15:14:53,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 588.0ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:14:53,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-08-06 15:14:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 491. [2021-08-06 15:14:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.593877551020408) internal successors, (1761), 490 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1761 transitions. [2021-08-06 15:14:53,831 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1761 transitions. Word has length 25 [2021-08-06 15:14:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:53,831 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1761 transitions. [2021-08-06 15:14:53,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:14:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1761 transitions. [2021-08-06 15:14:53,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:14:53,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:53,832 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:53,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 15:14:54,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:54,033 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:14:54,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:54,033 INFO L82 PathProgramCache]: Analyzing trace with hash 734927792, now seen corresponding path program 56 times [2021-08-06 15:14:54,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:54,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847965381] [2021-08-06 15:14:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:54,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:54,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:54,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847965381] [2021-08-06 15:14:54,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847965381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:54,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608260413] [2021-08-06 15:14:54,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:14:54,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:54,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:54,365 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) [2021-08-06 15:14:54,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 15:14:58,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:14:58,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:58,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:14:58,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:59,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608260413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:59,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:59,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:14:59,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614467957] [2021-08-06 15:14:59,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:14:59,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:59,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:14:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:14:59,222 INFO L87 Difference]: Start difference. First operand 491 states and 1761 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:14:59,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:59,602 INFO L93 Difference]: Finished difference Result 546 states and 1934 transitions. [2021-08-06 15:14:59,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:14:59,602 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:14:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:59,603 INFO L225 Difference]: With dead ends: 546 [2021-08-06 15:14:59,603 INFO L226 Difference]: Without dead ends: 541 [2021-08-06 15:14:59,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 616.0ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:14:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-08-06 15:14:59,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 495. [2021-08-06 15:14:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.5890688259109313) internal successors, (1773), 494 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:59,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1773 transitions. [2021-08-06 15:14:59,610 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1773 transitions. Word has length 25 [2021-08-06 15:14:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:59,610 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1773 transitions. [2021-08-06 15:14:59,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:14:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1773 transitions. [2021-08-06 15:14:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:14:59,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:59,611 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:59,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:59,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:59,811 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:14:59,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:59,812 INFO L82 PathProgramCache]: Analyzing trace with hash -573356214, now seen corresponding path program 57 times [2021-08-06 15:14:59,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:59,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471043295] [2021-08-06 15:14:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:59,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:00,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:00,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471043295] [2021-08-06 15:15:00,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471043295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:00,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382544016] [2021-08-06 15:15:00,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:15:00,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:00,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:00,210 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) [2021-08-06 15:15:00,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 15:15:04,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 15:15:04,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:04,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:15:04,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:05,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382544016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:05,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:05,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:15:05,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25253016] [2021-08-06 15:15:05,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:15:05,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:05,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:15:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:15:05,508 INFO L87 Difference]: Start difference. First operand 495 states and 1773 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:15:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:06,339 INFO L93 Difference]: Finished difference Result 736 states and 2600 transitions. [2021-08-06 15:15:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:15:06,339 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:15:06,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:06,340 INFO L225 Difference]: With dead ends: 736 [2021-08-06 15:15:06,340 INFO L226 Difference]: Without dead ends: 710 [2021-08-06 15:15:06,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 962.2ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:15:06,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-08-06 15:15:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 552. [2021-08-06 15:15:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 3.7259528130671504) internal successors, (2053), 551 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 2053 transitions. [2021-08-06 15:15:06,348 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 2053 transitions. Word has length 25 [2021-08-06 15:15:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:06,348 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 2053 transitions. [2021-08-06 15:15:06,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:15:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 2053 transitions. [2021-08-06 15:15:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:15:06,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:06,349 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:06,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-06 15:15:06,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:06,550 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:15:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:06,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1163236360, now seen corresponding path program 58 times [2021-08-06 15:15:06,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:06,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272315724] [2021-08-06 15:15:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:06,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:06,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:06,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272315724] [2021-08-06 15:15:06,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272315724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:06,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329669539] [2021-08-06 15:15:06,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:15:06,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:06,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:06,839 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) [2021-08-06 15:15:06,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 15:15:10,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:15:10,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:10,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:15:10,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:11,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329669539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:11,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:11,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:15:11,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771293333] [2021-08-06 15:15:11,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:15:11,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:15:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:15:11,838 INFO L87 Difference]: Start difference. First operand 552 states and 2053 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:15:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:12,190 INFO L93 Difference]: Finished difference Result 601 states and 2211 transitions. [2021-08-06 15:15:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:15:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 25 [2021-08-06 15:15:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:12,192 INFO L225 Difference]: With dead ends: 601 [2021-08-06 15:15:12,192 INFO L226 Difference]: Without dead ends: 596 [2021-08-06 15:15:12,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 601.4ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:15:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-08-06 15:15:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 552. [2021-08-06 15:15:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 3.7259528130671504) internal successors, (2053), 551 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 2053 transitions. [2021-08-06 15:15:12,202 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 2053 transitions. Word has length 25 [2021-08-06 15:15:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:12,202 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 2053 transitions. [2021-08-06 15:15:12,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:15:12,203 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 2053 transitions. [2021-08-06 15:15:12,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:15:12,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:12,204 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:12,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-06 15:15:12,416 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,SelfDestructingSolverStorable96 [2021-08-06 15:15:12,417 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:15:12,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:12,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1715713842, now seen corresponding path program 59 times [2021-08-06 15:15:12,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:12,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323479800] [2021-08-06 15:15:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:12,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:12,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:12,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323479800] [2021-08-06 15:15:12,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323479800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:12,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642845923] [2021-08-06 15:15:12,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:15:12,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:12,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:12,674 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) [2021-08-06 15:15:12,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 15:15:16,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:15:16,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:16,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:15:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:17,412 INFO L388 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 7 treesize of output 3 [2021-08-06 15:15:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:15:17,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642845923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:17,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:17,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-08-06 15:15:17,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558540217] [2021-08-06 15:15:17,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:15:17,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:17,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:15:17,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:15:17,973 INFO L87 Difference]: Start difference. First operand 552 states and 2053 transitions. Second operand has 20 states, 20 states have (on average 2.4) 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) [2021-08-06 15:15:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:18,283 INFO L93 Difference]: Finished difference Result 586 states and 2134 transitions. [2021-08-06 15:15:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:15:18,284 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) 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 25 [2021-08-06 15:15:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:18,285 INFO L225 Difference]: With dead ends: 586 [2021-08-06 15:15:18,285 INFO L226 Difference]: Without dead ends: 562 [2021-08-06 15:15:18,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 444.2ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:15:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-08-06 15:15:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 548. [2021-08-06 15:15:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.7239488117001827) internal successors, (2037), 547 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 2037 transitions. [2021-08-06 15:15:18,292 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 2037 transitions. Word has length 25 [2021-08-06 15:15:18,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:18,292 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 2037 transitions. [2021-08-06 15:15:18,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) 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) [2021-08-06 15:15:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 2037 transitions. [2021-08-06 15:15:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:15:18,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:18,294 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:18,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:18,496 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,SelfDestructingSolverStorable97 [2021-08-06 15:15:18,496 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:15:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:18,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1318801168, now seen corresponding path program 60 times [2021-08-06 15:15:18,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:18,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538686738] [2021-08-06 15:15:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:18,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:18,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:18,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538686738] [2021-08-06 15:15:18,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538686738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:18,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486236607] [2021-08-06 15:15:18,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:15:18,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:18,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:18,808 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) [2021-08-06 15:15:18,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 15:15:22,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:15:22,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:22,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:15:22,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:24,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486236607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:24,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:24,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:15:24,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544872053] [2021-08-06 15:15:24,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:15:24,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:24,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:15:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:15:24,030 INFO L87 Difference]: Start difference. First operand 548 states and 2037 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:15:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:24,486 INFO L93 Difference]: Finished difference Result 589 states and 2175 transitions. [2021-08-06 15:15:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:15:24,486 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 25 [2021-08-06 15:15:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:24,487 INFO L225 Difference]: With dead ends: 589 [2021-08-06 15:15:24,488 INFO L226 Difference]: Without dead ends: 584 [2021-08-06 15:15:24,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 728.1ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:15:24,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-08-06 15:15:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 554. [2021-08-06 15:15:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.7432188065099457) internal successors, (2070), 553 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 2070 transitions. [2021-08-06 15:15:24,495 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 2070 transitions. Word has length 25 [2021-08-06 15:15:24,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:24,495 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 2070 transitions. [2021-08-06 15:15:24,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:15:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 2070 transitions. [2021-08-06 15:15:24,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:15:24,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:24,497 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:24,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 15:15:24,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:24,701 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:15:24,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:24,701 INFO L82 PathProgramCache]: Analyzing trace with hash 755306190, now seen corresponding path program 61 times [2021-08-06 15:15:24,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:24,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697244852] [2021-08-06 15:15:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:24,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:15:24,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:24,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697244852] [2021-08-06 15:15:24,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697244852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:24,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045786933] [2021-08-06 15:15:24,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:15:24,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:24,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:24,887 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) [2021-08-06 15:15:24,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 15:15:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:29,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:15:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:29,677 INFO L388 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 7 treesize of output 3 [2021-08-06 15:15:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:15:30,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045786933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:30,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:30,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-08-06 15:15:30,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665452460] [2021-08-06 15:15:30,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:15:30,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:30,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:15:30,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:15:30,469 INFO L87 Difference]: Start difference. First operand 554 states and 2070 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-08-06 15:15:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:30,775 INFO L93 Difference]: Finished difference Result 1282 states and 4742 transitions. [2021-08-06 15:15:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:15:30,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 25 [2021-08-06 15:15:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:30,777 INFO L225 Difference]: With dead ends: 1282 [2021-08-06 15:15:30,777 INFO L226 Difference]: Without dead ends: 1262 [2021-08-06 15:15:30,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:15:30,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-08-06 15:15:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 765. [2021-08-06 15:15:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 4.06151832460733) internal successors, (3103), 764 states have internal predecessors, (3103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 3103 transitions. [2021-08-06 15:15:30,791 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 3103 transitions. Word has length 25 [2021-08-06 15:15:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:30,791 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 3103 transitions. [2021-08-06 15:15:30,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-08-06 15:15:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 3103 transitions. [2021-08-06 15:15:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:15:30,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:30,793 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:30,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 15:15:30,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:30,997 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:15:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:30,997 INFO L82 PathProgramCache]: Analyzing trace with hash 894489932, now seen corresponding path program 62 times [2021-08-06 15:15:30,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:30,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84726204] [2021-08-06 15:15:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:30,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:31,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:31,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84726204] [2021-08-06 15:15:31,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84726204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:31,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129519946] [2021-08-06 15:15:31,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:15:31,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:31,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:31,254 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) [2021-08-06 15:15:31,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 15:15:35,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:15:35,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:35,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:15:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:36,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129519946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:36,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:36,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:15:36,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356839187] [2021-08-06 15:15:36,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:15:36,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:36,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:15:36,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:15:36,526 INFO L87 Difference]: Start difference. First operand 765 states and 3103 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:15:36,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:36,980 INFO L93 Difference]: Finished difference Result 807 states and 3240 transitions. [2021-08-06 15:15:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:15:36,980 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 25 [2021-08-06 15:15:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:36,982 INFO L225 Difference]: With dead ends: 807 [2021-08-06 15:15:36,982 INFO L226 Difference]: Without dead ends: 802 [2021-08-06 15:15:36,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 674.6ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:15:36,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-08-06 15:15:36,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 768. [2021-08-06 15:15:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 4.070404172099088) internal successors, (3122), 767 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 3122 transitions. [2021-08-06 15:15:36,992 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 3122 transitions. Word has length 25 [2021-08-06 15:15:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:36,992 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 3122 transitions. [2021-08-06 15:15:36,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:15:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 3122 transitions. [2021-08-06 15:15:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:15:36,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:36,993 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:37,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 15:15:37,194 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,SelfDestructingSolverStorable100 [2021-08-06 15:15:37,194 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:15:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash 49518480, now seen corresponding path program 63 times [2021-08-06 15:15:37,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:37,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285798925] [2021-08-06 15:15:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:37,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:37,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:37,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285798925] [2021-08-06 15:15:37,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285798925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:37,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371862082] [2021-08-06 15:15:37,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:15:37,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:37,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:37,498 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) [2021-08-06 15:15:37,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 15:15:41,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:15:41,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:41,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:15:41,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:42,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371862082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:42,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:42,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:15:42,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408081574] [2021-08-06 15:15:42,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:15:42,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:15:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:15:42,868 INFO L87 Difference]: Start difference. First operand 768 states and 3122 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:15:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:43,526 INFO L93 Difference]: Finished difference Result 822 states and 3286 transitions. [2021-08-06 15:15:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:15:43,526 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 25 [2021-08-06 15:15:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:43,528 INFO L225 Difference]: With dead ends: 822 [2021-08-06 15:15:43,528 INFO L226 Difference]: Without dead ends: 817 [2021-08-06 15:15:43,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 844.7ms TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:15:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-08-06 15:15:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 761. [2021-08-06 15:15:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 4.081578947368421) internal successors, (3102), 760 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:43,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 3102 transitions. [2021-08-06 15:15:43,538 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 3102 transitions. Word has length 25 [2021-08-06 15:15:43,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:43,538 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 3102 transitions. [2021-08-06 15:15:43,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:15:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 3102 transitions. [2021-08-06 15:15:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:15:43,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:43,539 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:43,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:43,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:43,743 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:15:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:43,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2048541114, now seen corresponding path program 64 times [2021-08-06 15:15:43,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:43,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660048526] [2021-08-06 15:15:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:43,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:43,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:43,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660048526] [2021-08-06 15:15:43,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660048526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:43,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508456049] [2021-08-06 15:15:43,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:15:43,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:43,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:43,986 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) [2021-08-06 15:15:43,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 15:15:48,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:15:48,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:48,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:15:48,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:48,780 INFO L388 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 7 treesize of output 3 [2021-08-06 15:15:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:49,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508456049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:49,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:49,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-08-06 15:15:49,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050786799] [2021-08-06 15:15:49,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:15:49,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:49,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:15:49,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:15:49,128 INFO L87 Difference]: Start difference. First operand 761 states and 3102 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-08-06 15:15:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:49,498 INFO L93 Difference]: Finished difference Result 1174 states and 4642 transitions. [2021-08-06 15:15:49,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:15:49,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 25 [2021-08-06 15:15:49,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:49,501 INFO L225 Difference]: With dead ends: 1174 [2021-08-06 15:15:49,501 INFO L226 Difference]: Without dead ends: 1144 [2021-08-06 15:15:49,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:15:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-08-06 15:15:49,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 765. [2021-08-06 15:15:49,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 4.047120418848167) internal successors, (3092), 764 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 3092 transitions. [2021-08-06 15:15:49,513 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 3092 transitions. Word has length 25 [2021-08-06 15:15:49,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:49,514 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 3092 transitions. [2021-08-06 15:15:49,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-08-06 15:15:49,514 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 3092 transitions. [2021-08-06 15:15:49,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:15:49,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:49,515 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:49,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:49,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 15:15:49,715 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:15:49,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:49,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2001288298, now seen corresponding path program 65 times [2021-08-06 15:15:49,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:49,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3156313] [2021-08-06 15:15:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:49,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:50,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:50,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3156313] [2021-08-06 15:15:50,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3156313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:50,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641147562] [2021-08-06 15:15:50,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:15:50,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:50,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:50,061 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) [2021-08-06 15:15:50,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 15:15:54,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:15:54,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:54,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:15:54,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:55,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641147562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:55,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:55,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:15:55,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750526292] [2021-08-06 15:15:55,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:15:55,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:15:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:15:55,613 INFO L87 Difference]: Start difference. First operand 765 states and 3092 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:15:55,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:55,855 INFO L93 Difference]: Finished difference Result 833 states and 3331 transitions. [2021-08-06 15:15:55,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:15:55,855 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:15:55,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:55,857 INFO L225 Difference]: With dead ends: 833 [2021-08-06 15:15:55,857 INFO L226 Difference]: Without dead ends: 823 [2021-08-06 15:15:55,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:15:55,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-08-06 15:15:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 771. [2021-08-06 15:15:55,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 4.0532467532467535) internal successors, (3121), 770 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 3121 transitions. [2021-08-06 15:15:55,868 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 3121 transitions. Word has length 25 [2021-08-06 15:15:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:55,868 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 3121 transitions. [2021-08-06 15:15:55,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:15:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 3121 transitions. [2021-08-06 15:15:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:15:55,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:55,870 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:55,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 15:15:56,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 15:15:56,070 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:15:56,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:56,070 INFO L82 PathProgramCache]: Analyzing trace with hash 391580476, now seen corresponding path program 66 times [2021-08-06 15:15:56,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:56,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004513595] [2021-08-06 15:15:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:56,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:56,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:56,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004513595] [2021-08-06 15:15:56,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004513595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:56,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724163118] [2021-08-06 15:15:56,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:15:56,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:56,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:56,373 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) [2021-08-06 15:15:56,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 15:16:00,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:16:00,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:00,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:16:00,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:02,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724163118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:02,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:02,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:16:02,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592902436] [2021-08-06 15:16:02,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:16:02,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:02,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:16:02,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:16:02,025 INFO L87 Difference]: Start difference. First operand 771 states and 3121 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:16:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:02,381 INFO L93 Difference]: Finished difference Result 816 states and 3267 transitions. [2021-08-06 15:16:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:16:02,382 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:16:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:02,383 INFO L225 Difference]: With dead ends: 816 [2021-08-06 15:16:02,383 INFO L226 Difference]: Without dead ends: 811 [2021-08-06 15:16:02,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:16:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-08-06 15:16:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 773. [2021-08-06 15:16:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 4.049222797927461) internal successors, (3126), 772 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 3126 transitions. [2021-08-06 15:16:02,393 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 3126 transitions. Word has length 25 [2021-08-06 15:16:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:02,394 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 3126 transitions. [2021-08-06 15:16:02,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:16:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 3126 transitions. [2021-08-06 15:16:02,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:16:02,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:02,395 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:02,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 15:16:02,595 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,SelfDestructingSolverStorable104 [2021-08-06 15:16:02,595 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:02,596 INFO L82 PathProgramCache]: Analyzing trace with hash -494217804, now seen corresponding path program 67 times [2021-08-06 15:16:02,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:02,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470415330] [2021-08-06 15:16:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:02,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:02,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:02,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470415330] [2021-08-06 15:16:02,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470415330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:02,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357112157] [2021-08-06 15:16:02,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:16:02,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:02,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:02,882 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) [2021-08-06 15:16:02,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 15:16:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:16:07,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:08,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357112157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:08,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:08,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:16:08,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551107756] [2021-08-06 15:16:08,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:16:08,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:08,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:16:08,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:16:08,628 INFO L87 Difference]: Start difference. First operand 773 states and 3126 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:16:08,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:08,973 INFO L93 Difference]: Finished difference Result 812 states and 3239 transitions. [2021-08-06 15:16:08,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:16:08,973 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:16:08,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:08,975 INFO L225 Difference]: With dead ends: 812 [2021-08-06 15:16:08,975 INFO L226 Difference]: Without dead ends: 807 [2021-08-06 15:16:08,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 581.7ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:16:08,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-08-06 15:16:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 771. [2021-08-06 15:16:08,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 4.0532467532467535) internal successors, (3121), 770 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 3121 transitions. [2021-08-06 15:16:08,985 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 3121 transitions. Word has length 25 [2021-08-06 15:16:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:08,985 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 3121 transitions. [2021-08-06 15:16:08,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:16:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 3121 transitions. [2021-08-06 15:16:09,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:16:09,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:09,000 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:09,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 15:16:09,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:09,201 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:09,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:09,202 INFO L82 PathProgramCache]: Analyzing trace with hash -91147080, now seen corresponding path program 68 times [2021-08-06 15:16:09,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:09,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928087910] [2021-08-06 15:16:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:09,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:09,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:09,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928087910] [2021-08-06 15:16:09,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928087910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:09,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562293674] [2021-08-06 15:16:09,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:16:09,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:09,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:09,493 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) [2021-08-06 15:16:09,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 15:16:14,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:16:14,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:14,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:16:14,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:15,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562293674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:15,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:15,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:16:15,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887547334] [2021-08-06 15:16:15,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:16:15,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:15,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:16:15,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:16:15,056 INFO L87 Difference]: Start difference. First operand 771 states and 3121 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:16:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:15,373 INFO L93 Difference]: Finished difference Result 814 states and 3262 transitions. [2021-08-06 15:16:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:16:15,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:16:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:15,375 INFO L225 Difference]: With dead ends: 814 [2021-08-06 15:16:15,375 INFO L226 Difference]: Without dead ends: 809 [2021-08-06 15:16:15,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 584.4ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:16:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-08-06 15:16:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 771. [2021-08-06 15:16:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 4.0532467532467535) internal successors, (3121), 770 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 3121 transitions. [2021-08-06 15:16:15,385 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 3121 transitions. Word has length 25 [2021-08-06 15:16:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:15,386 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 3121 transitions. [2021-08-06 15:16:15,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:16:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 3121 transitions. [2021-08-06 15:16:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:16:15,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:15,387 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:15,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 15:16:15,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:15,588 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:15,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:15,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1399431086, now seen corresponding path program 69 times [2021-08-06 15:16:15,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:15,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669483394] [2021-08-06 15:16:15,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:15,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:15,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:15,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669483394] [2021-08-06 15:16:15,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669483394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:15,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232838718] [2021-08-06 15:16:15,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:16:15,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:15,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:15,870 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) [2021-08-06 15:16:15,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 15:16:20,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:16:20,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:20,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:16:20,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:21,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232838718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:21,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:21,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:16:21,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72850405] [2021-08-06 15:16:21,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:16:21,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:16:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:16:21,421 INFO L87 Difference]: Start difference. First operand 771 states and 3121 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:16:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:22,035 INFO L93 Difference]: Finished difference Result 1086 states and 4280 transitions. [2021-08-06 15:16:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:16:22,035 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:16:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:22,037 INFO L225 Difference]: With dead ends: 1086 [2021-08-06 15:16:22,037 INFO L226 Difference]: Without dead ends: 1076 [2021-08-06 15:16:22,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 756.7ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:16:22,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-08-06 15:16:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 823. [2021-08-06 15:16:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 4.127737226277373) internal successors, (3393), 822 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 3393 transitions. [2021-08-06 15:16:22,050 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 3393 transitions. Word has length 25 [2021-08-06 15:16:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:22,050 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 3393 transitions. [2021-08-06 15:16:22,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:16:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 3393 transitions. [2021-08-06 15:16:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:16:22,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:22,052 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:22,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 15:16:22,252 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,SelfDestructingSolverStorable107 [2021-08-06 15:16:22,252 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash 197977746, now seen corresponding path program 70 times [2021-08-06 15:16:22,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:22,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482924302] [2021-08-06 15:16:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:22,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:22,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:22,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482924302] [2021-08-06 15:16:22,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482924302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:22,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355990653] [2021-08-06 15:16:22,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:16:22,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:22,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:22,404 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) [2021-08-06 15:16:22,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 15:16:27,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:16:27,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:27,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:16:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:27,626 INFO L388 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 7 treesize of output 3 [2021-08-06 15:16:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:28,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355990653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:28,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:28,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 15:16:28,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965783095] [2021-08-06 15:16:28,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:16:28,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:28,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:16:28,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:16:28,423 INFO L87 Difference]: Start difference. First operand 823 states and 3393 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-08-06 15:16:28,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:28,705 INFO L93 Difference]: Finished difference Result 829 states and 3376 transitions. [2021-08-06 15:16:28,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:16:28,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 25 [2021-08-06 15:16:28,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:28,707 INFO L225 Difference]: With dead ends: 829 [2021-08-06 15:16:28,707 INFO L226 Difference]: Without dead ends: 813 [2021-08-06 15:16:28,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 414.7ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:16:28,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-08-06 15:16:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 796. [2021-08-06 15:16:28,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 4.1471698113207545) internal successors, (3297), 795 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 3297 transitions. [2021-08-06 15:16:28,718 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 3297 transitions. Word has length 25 [2021-08-06 15:16:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:28,718 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 3297 transitions. [2021-08-06 15:16:28,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-08-06 15:16:28,718 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 3297 transitions. [2021-08-06 15:16:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:16:28,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:28,719 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:28,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 15:16:28,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:28,920 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:28,920 INFO L82 PathProgramCache]: Analyzing trace with hash 337161488, now seen corresponding path program 71 times [2021-08-06 15:16:28,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:28,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386035408] [2021-08-06 15:16:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:28,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:29,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:29,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386035408] [2021-08-06 15:16:29,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386035408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:29,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869341671] [2021-08-06 15:16:29,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:16:29,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:29,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:29,177 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) [2021-08-06 15:16:29,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 15:16:33,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 15:16:33,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:16:33,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:34,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869341671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:34,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:34,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:16:34,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697401656] [2021-08-06 15:16:34,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:16:34,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:16:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:16:34,942 INFO L87 Difference]: Start difference. First operand 796 states and 3297 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:16:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:35,518 INFO L93 Difference]: Finished difference Result 839 states and 3438 transitions. [2021-08-06 15:16:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:16:35,518 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 25 [2021-08-06 15:16:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:35,520 INFO L225 Difference]: With dead ends: 839 [2021-08-06 15:16:35,520 INFO L226 Difference]: Without dead ends: 834 [2021-08-06 15:16:35,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 754.9ms TimeCoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:16:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-08-06 15:16:35,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 796. [2021-08-06 15:16:35,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 4.152201257861635) internal successors, (3301), 795 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:35,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 3301 transitions. [2021-08-06 15:16:35,531 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 3301 transitions. Word has length 25 [2021-08-06 15:16:35,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:35,531 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 3301 transitions. [2021-08-06 15:16:35,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:16:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 3301 transitions. [2021-08-06 15:16:35,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:16:35,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:35,533 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:35,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 15:16:35,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:35,733 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:35,733 INFO L82 PathProgramCache]: Analyzing trace with hash -507809964, now seen corresponding path program 72 times [2021-08-06 15:16:35,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:35,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707804118] [2021-08-06 15:16:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:35,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:36,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:36,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707804118] [2021-08-06 15:16:36,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707804118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:36,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063688720] [2021-08-06 15:16:36,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:16:36,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:36,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:36,009 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) [2021-08-06 15:16:36,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 15:16:40,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:16:40,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:40,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:16:40,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:41,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063688720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:41,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:41,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:16:41,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006652503] [2021-08-06 15:16:41,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:16:41,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:41,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:16:41,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:16:41,953 INFO L87 Difference]: Start difference. First operand 796 states and 3301 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:16:42,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:42,242 INFO L93 Difference]: Finished difference Result 837 states and 3433 transitions. [2021-08-06 15:16:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:16:42,242 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 25 [2021-08-06 15:16:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:42,244 INFO L225 Difference]: With dead ends: 837 [2021-08-06 15:16:42,244 INFO L226 Difference]: Without dead ends: 832 [2021-08-06 15:16:42,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:16:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-08-06 15:16:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 788. [2021-08-06 15:16:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 4.163913595933926) internal successors, (3277), 787 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 3277 transitions. [2021-08-06 15:16:42,273 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 3277 transitions. Word has length 25 [2021-08-06 15:16:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:42,274 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 3277 transitions. [2021-08-06 15:16:42,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2021-08-06 15:16:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 3277 transitions. [2021-08-06 15:16:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:16:42,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:42,275 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:42,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 15:16:42,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:42,476 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1987630858, now seen corresponding path program 73 times [2021-08-06 15:16:42,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:42,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586635229] [2021-08-06 15:16:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:42,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:16:42,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:42,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586635229] [2021-08-06 15:16:42,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586635229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:42,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508775414] [2021-08-06 15:16:42,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:16:42,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:42,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:42,634 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) [2021-08-06 15:16:42,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 15:16:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:47,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:16:47,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:47,939 INFO L388 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 7 treesize of output 3 [2021-08-06 15:16:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:48,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508775414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:48,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:48,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 15:16:48,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366582871] [2021-08-06 15:16:48,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:16:48,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:16:48,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:16:48,276 INFO L87 Difference]: Start difference. First operand 788 states and 3277 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 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) [2021-08-06 15:16:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:48,405 INFO L93 Difference]: Finished difference Result 1361 states and 5536 transitions. [2021-08-06 15:16:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:16:48,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 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 25 [2021-08-06 15:16:48,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:48,408 INFO L225 Difference]: With dead ends: 1361 [2021-08-06 15:16:48,408 INFO L226 Difference]: Without dead ends: 1331 [2021-08-06 15:16:48,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:16:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-08-06 15:16:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 815. [2021-08-06 15:16:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 4.267813267813268) internal successors, (3474), 814 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 3474 transitions. [2021-08-06 15:16:48,424 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 3474 transitions. Word has length 25 [2021-08-06 15:16:48,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:48,424 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 3474 transitions. [2021-08-06 15:16:48,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 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) [2021-08-06 15:16:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 3474 transitions. [2021-08-06 15:16:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:16:48,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:48,426 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:48,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 15:16:48,626 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,SelfDestructingSolverStorable111 [2021-08-06 15:16:48,626 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:48,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:48,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1742492974, now seen corresponding path program 74 times [2021-08-06 15:16:48,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:48,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790388519] [2021-08-06 15:16:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:48,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:48,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:48,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790388519] [2021-08-06 15:16:48,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790388519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:48,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730478882] [2021-08-06 15:16:48,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:16:48,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:48,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:48,930 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) [2021-08-06 15:16:48,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 15:16:53,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:16:53,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:53,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:16:53,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:54,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730478882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:54,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:54,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:16:54,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496125336] [2021-08-06 15:16:54,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:16:54,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:54,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:16:54,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:16:54,963 INFO L87 Difference]: Start difference. First operand 815 states and 3474 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:16:55,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:55,435 INFO L93 Difference]: Finished difference Result 850 states and 3595 transitions. [2021-08-06 15:16:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:16:55,435 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:16:55,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:55,437 INFO L225 Difference]: With dead ends: 850 [2021-08-06 15:16:55,437 INFO L226 Difference]: Without dead ends: 845 [2021-08-06 15:16:55,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 711.4ms TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:16:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-08-06 15:16:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 811. [2021-08-06 15:16:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 4.292592592592593) internal successors, (3477), 810 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 3477 transitions. [2021-08-06 15:16:55,448 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 3477 transitions. Word has length 25 [2021-08-06 15:16:55,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:55,448 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 3477 transitions. [2021-08-06 15:16:55,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:16:55,448 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 3477 transitions. [2021-08-06 15:16:55,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:16:55,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:16:55,449 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:16:55,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 15:16:55,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 15:16:55,650 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:16:55,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:16:55,650 INFO L82 PathProgramCache]: Analyzing trace with hash 650375800, now seen corresponding path program 75 times [2021-08-06 15:16:55,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:16:55,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078049036] [2021-08-06 15:16:55,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:16:55,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:16:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:16:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:55,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:16:55,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078049036] [2021-08-06 15:16:55,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078049036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:55,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44203758] [2021-08-06 15:16:55,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:16:55,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:16:55,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:16:55,945 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) [2021-08-06 15:16:55,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 15:17:00,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:17:00,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:00,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:17:00,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:02,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44203758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:02,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:02,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:17:02,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154336651] [2021-08-06 15:17:02,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:17:02,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:17:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:17:02,030 INFO L87 Difference]: Start difference. First operand 811 states and 3477 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:17:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:02,419 INFO L93 Difference]: Finished difference Result 848 states and 3601 transitions. [2021-08-06 15:17:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:17:02,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:17:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:02,421 INFO L225 Difference]: With dead ends: 848 [2021-08-06 15:17:02,421 INFO L226 Difference]: Without dead ends: 843 [2021-08-06 15:17:02,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 616.9ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:17:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-08-06 15:17:02,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 807. [2021-08-06 15:17:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 4.303970223325062) internal successors, (3469), 806 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 3469 transitions. [2021-08-06 15:17:02,434 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 3469 transitions. Word has length 25 [2021-08-06 15:17:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:02,434 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 3469 transitions. [2021-08-06 15:17:02,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:17:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 3469 transitions. [2021-08-06 15:17:02,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:17:02,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:02,435 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:02,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-06 15:17:02,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 15:17:02,636 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:02,636 INFO L82 PathProgramCache]: Analyzing trace with hash -235422480, now seen corresponding path program 76 times [2021-08-06 15:17:02,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:02,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978271755] [2021-08-06 15:17:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:02,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:02,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:02,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978271755] [2021-08-06 15:17:02,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978271755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:02,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051191390] [2021-08-06 15:17:02,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:17:02,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:02,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:02,952 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:17:02,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 15:17:07,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:17:07,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:07,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:17:07,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:09,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051191390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:09,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:09,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:17:09,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313950651] [2021-08-06 15:17:09,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:17:09,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:09,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:17:09,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:17:09,131 INFO L87 Difference]: Start difference. First operand 807 states and 3469 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:17:09,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:09,541 INFO L93 Difference]: Finished difference Result 844 states and 3590 transitions. [2021-08-06 15:17:09,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:17:09,541 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 25 [2021-08-06 15:17:09,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:09,543 INFO L225 Difference]: With dead ends: 844 [2021-08-06 15:17:09,543 INFO L226 Difference]: Without dead ends: 839 [2021-08-06 15:17:09,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 605.3ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:17:09,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-08-06 15:17:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 795. [2021-08-06 15:17:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 4.329974811083123) internal successors, (3438), 794 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 3438 transitions. [2021-08-06 15:17:09,554 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 3438 transitions. Word has length 25 [2021-08-06 15:17:09,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:09,554 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 3438 transitions. [2021-08-06 15:17:09,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2021-08-06 15:17:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 3438 transitions. [2021-08-06 15:17:09,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:17:09,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:09,556 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:09,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 15:17:09,756 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,SelfDestructingSolverStorable114 [2021-08-06 15:17:09,756 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:09,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:09,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1504041455, now seen corresponding path program 77 times [2021-08-06 15:17:09,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:09,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265355391] [2021-08-06 15:17:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:09,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:17:09,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:09,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265355391] [2021-08-06 15:17:09,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265355391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:09,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301659812] [2021-08-06 15:17:09,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:17:09,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:09,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:09,936 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) [2021-08-06 15:17:09,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 15:17:15,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:17:15,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:17:15,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:15,616 INFO L388 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 7 treesize of output 3 [2021-08-06 15:17:15,728 INFO L388 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 7 treesize of output 3 [2021-08-06 15:17:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:17:17,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301659812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:17,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:17,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-06 15:17:17,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952403093] [2021-08-06 15:17:17,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:17:17,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:17,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:17:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=215, Unknown=1, NotChecked=0, Total=272 [2021-08-06 15:17:17,099 INFO L87 Difference]: Start difference. First operand 795 states and 3438 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-08-06 15:17:17,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:17,530 INFO L93 Difference]: Finished difference Result 1078 states and 4353 transitions. [2021-08-06 15:17:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:17:17,530 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 [2021-08-06 15:17:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:17,532 INFO L225 Difference]: With dead ends: 1078 [2021-08-06 15:17:17,533 INFO L226 Difference]: Without dead ends: 1062 [2021-08-06 15:17:17,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 775.6ms TimeCoverageRelationStatistics Valid=81, Invalid=338, Unknown=1, NotChecked=0, Total=420 [2021-08-06 15:17:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-08-06 15:17:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 906. [2021-08-06 15:17:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 4.2243093922651935) internal successors, (3823), 905 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 3823 transitions. [2021-08-06 15:17:17,548 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 3823 transitions. Word has length 26 [2021-08-06 15:17:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:17,549 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 3823 transitions. [2021-08-06 15:17:17,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-08-06 15:17:17,549 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 3823 transitions. [2021-08-06 15:17:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:17:17,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:17,550 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:17,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 15:17:17,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:17,751 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:17,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:17,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1007187157, now seen corresponding path program 78 times [2021-08-06 15:17:17,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:17,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007935745] [2021-08-06 15:17:17,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:17,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:17:18,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:18,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007935745] [2021-08-06 15:17:18,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007935745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:18,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614712941] [2021-08-06 15:17:18,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:17:18,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:18,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:18,029 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) [2021-08-06 15:17:18,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 15:17:23,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:17:23,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:23,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:17:23,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:23,953 INFO L388 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 7 treesize of output 3 [2021-08-06 15:17:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:17:24,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614712941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:24,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:24,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:17:24,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446752484] [2021-08-06 15:17:24,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:17:24,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:17:24,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:17:24,660 INFO L87 Difference]: Start difference. First operand 906 states and 3823 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:24,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:24,863 INFO L93 Difference]: Finished difference Result 1197 states and 4758 transitions. [2021-08-06 15:17:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:17:24,863 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:17:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:24,865 INFO L225 Difference]: With dead ends: 1197 [2021-08-06 15:17:24,865 INFO L226 Difference]: Without dead ends: 1188 [2021-08-06 15:17:24,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:17:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-08-06 15:17:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 922. [2021-08-06 15:17:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 4.182410423452769) internal successors, (3852), 921 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3852 transitions. [2021-08-06 15:17:24,880 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3852 transitions. Word has length 26 [2021-08-06 15:17:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:24,880 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 3852 transitions. [2021-08-06 15:17:24,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3852 transitions. [2021-08-06 15:17:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:17:24,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:24,881 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:24,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 15:17:25,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:25,082 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:25,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:25,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2031901081, now seen corresponding path program 79 times [2021-08-06 15:17:25,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:25,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087771649] [2021-08-06 15:17:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:25,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:25,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:25,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087771649] [2021-08-06 15:17:25,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087771649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:25,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586623822] [2021-08-06 15:17:25,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:17:25,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:25,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:25,506 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) [2021-08-06 15:17:25,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 15:17:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:30,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:17:30,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:31,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586623822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:31,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:31,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:17:31,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783962492] [2021-08-06 15:17:31,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:17:31,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:31,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:17:31,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:17:31,849 INFO L87 Difference]: Start difference. First operand 922 states and 3852 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:17:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:32,168 INFO L93 Difference]: Finished difference Result 967 states and 3984 transitions. [2021-08-06 15:17:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:17:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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 [2021-08-06 15:17:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:32,171 INFO L225 Difference]: With dead ends: 967 [2021-08-06 15:17:32,171 INFO L226 Difference]: Without dead ends: 959 [2021-08-06 15:17:32,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 587.4ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:17:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-08-06 15:17:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 926. [2021-08-06 15:17:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 4.184864864864865) internal successors, (3871), 925 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3871 transitions. [2021-08-06 15:17:32,189 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3871 transitions. Word has length 26 [2021-08-06 15:17:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:32,190 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3871 transitions. [2021-08-06 15:17:32,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:17:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3871 transitions. [2021-08-06 15:17:32,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:17:32,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:32,192 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:32,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 15:17:32,404 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,SelfDestructingSolverStorable117 [2021-08-06 15:17:32,405 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:32,405 INFO L82 PathProgramCache]: Analyzing trace with hash -677628759, now seen corresponding path program 80 times [2021-08-06 15:17:32,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:32,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5947560] [2021-08-06 15:17:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:32,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:17:32,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:32,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5947560] [2021-08-06 15:17:32,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5947560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:32,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935100312] [2021-08-06 15:17:32,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:17:32,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:32,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:32,623 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) [2021-08-06 15:17:32,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 15:17:37,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:17:37,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:37,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:17:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:38,632 INFO L388 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 7 treesize of output 3 [2021-08-06 15:17:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:17:39,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935100312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:39,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:39,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:17:39,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147077731] [2021-08-06 15:17:39,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:17:39,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:39,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:17:39,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:17:39,116 INFO L87 Difference]: Start difference. First operand 926 states and 3871 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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) [2021-08-06 15:17:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:41,445 INFO L93 Difference]: Finished difference Result 1016 states and 4015 transitions. [2021-08-06 15:17:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:17:41,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 [2021-08-06 15:17:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:41,447 INFO L225 Difference]: With dead ends: 1016 [2021-08-06 15:17:41,448 INFO L226 Difference]: Without dead ends: 1004 [2021-08-06 15:17:41,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 509.1ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:17:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-08-06 15:17:41,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 894. [2021-08-06 15:17:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 4.128779395296752) internal successors, (3687), 893 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3687 transitions. [2021-08-06 15:17:41,460 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3687 transitions. Word has length 26 [2021-08-06 15:17:41,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:41,460 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 3687 transitions. [2021-08-06 15:17:41,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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) [2021-08-06 15:17:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3687 transitions. [2021-08-06 15:17:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:17:41,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:41,462 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:41,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 15:17:41,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:41,663 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:41,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:41,663 INFO L82 PathProgramCache]: Analyzing trace with hash 157300805, now seen corresponding path program 81 times [2021-08-06 15:17:41,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:41,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270157875] [2021-08-06 15:17:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:41,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:17:41,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:41,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270157875] [2021-08-06 15:17:41,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270157875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:41,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411282992] [2021-08-06 15:17:41,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:17:41,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:41,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:41,898 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) [2021-08-06 15:17:41,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 15:17:47,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:17:47,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:47,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:17:47,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:47,878 INFO L388 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 7 treesize of output 3 [2021-08-06 15:17:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:17:48,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411282992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:48,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:48,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-08-06 15:17:48,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260466771] [2021-08-06 15:17:48,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:17:48,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:17:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:17:48,096 INFO L87 Difference]: Start difference. First operand 894 states and 3687 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-08-06 15:17:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:48,411 INFO L93 Difference]: Finished difference Result 1104 states and 4305 transitions. [2021-08-06 15:17:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:17:48,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 [2021-08-06 15:17:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:48,414 INFO L225 Difference]: With dead ends: 1104 [2021-08-06 15:17:48,414 INFO L226 Difference]: Without dead ends: 1084 [2021-08-06 15:17:48,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 413.4ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:17:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-08-06 15:17:48,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 880. [2021-08-06 15:17:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 4.108077360637088) internal successors, (3611), 879 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:48,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3611 transitions. [2021-08-06 15:17:48,434 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3611 transitions. Word has length 26 [2021-08-06 15:17:48,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:48,434 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 3611 transitions. [2021-08-06 15:17:48,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-08-06 15:17:48,434 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3611 transitions. [2021-08-06 15:17:48,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:17:48,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:48,436 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:48,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 15:17:48,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:48,651 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:48,651 INFO L82 PathProgramCache]: Analyzing trace with hash -867413119, now seen corresponding path program 82 times [2021-08-06 15:17:48,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:48,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091281593] [2021-08-06 15:17:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:48,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:49,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:49,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091281593] [2021-08-06 15:17:49,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091281593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:49,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963987404] [2021-08-06 15:17:49,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:17:49,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:49,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:49,020 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) [2021-08-06 15:17:49,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 15:17:54,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:17:54,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:17:54,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:17:54,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:17:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:17:55,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963987404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:55,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:17:55,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:17:55,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585458849] [2021-08-06 15:17:55,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:17:55,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:17:55,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:17:55,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:17:55,397 INFO L87 Difference]: Start difference. First operand 880 states and 3611 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:17:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:17:55,716 INFO L93 Difference]: Finished difference Result 921 states and 3730 transitions. [2021-08-06 15:17:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:17:55,717 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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 [2021-08-06 15:17:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:17:55,718 INFO L225 Difference]: With dead ends: 921 [2021-08-06 15:17:55,719 INFO L226 Difference]: Without dead ends: 913 [2021-08-06 15:17:55,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 647.2ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:17:55,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-08-06 15:17:55,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 878. [2021-08-06 15:17:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 4.108323831242873) internal successors, (3603), 877 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:17:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 3603 transitions. [2021-08-06 15:17:55,730 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 3603 transitions. Word has length 26 [2021-08-06 15:17:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:17:55,731 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 3603 transitions. [2021-08-06 15:17:55,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:17:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 3603 transitions. [2021-08-06 15:17:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:17:55,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:17:55,732 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:17:55,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 15:17:55,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:55,933 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:17:55,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:17:55,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1532642099, now seen corresponding path program 83 times [2021-08-06 15:17:55,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:17:55,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427673793] [2021-08-06 15:17:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:17:55,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:17:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:17:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:17:56,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:17:56,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427673793] [2021-08-06 15:17:56,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427673793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:17:56,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227297504] [2021-08-06 15:17:56,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:17:56,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:17:56,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:17:56,169 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) [2021-08-06 15:17:56,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 15:18:01,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:18:01,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:01,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:18:01,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:02,315 INFO L388 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 7 treesize of output 3 [2021-08-06 15:18:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:18:03,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227297504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:03,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:03,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:18:03,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532143176] [2021-08-06 15:18:03,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:18:03,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:03,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:18:03,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:18:03,042 INFO L87 Difference]: Start difference. First operand 878 states and 3603 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:03,309 INFO L93 Difference]: Finished difference Result 987 states and 3589 transitions. [2021-08-06 15:18:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:18:03,309 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:18:03,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:03,311 INFO L225 Difference]: With dead ends: 987 [2021-08-06 15:18:03,311 INFO L226 Difference]: Without dead ends: 957 [2021-08-06 15:18:03,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:18:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-08-06 15:18:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 617. [2021-08-06 15:18:03,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 3.840909090909091) internal successors, (2366), 616 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:03,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 2366 transitions. [2021-08-06 15:18:03,322 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 2366 transitions. Word has length 26 [2021-08-06 15:18:03,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:03,322 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 2366 transitions. [2021-08-06 15:18:03,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:03,322 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 2366 transitions. [2021-08-06 15:18:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:18:03,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:03,323 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:03,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-06 15:18:03,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:03,524 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:03,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:03,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1737611273, now seen corresponding path program 84 times [2021-08-06 15:18:03,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:03,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111774328] [2021-08-06 15:18:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:03,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:03,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:03,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111774328] [2021-08-06 15:18:03,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111774328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:03,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5568646] [2021-08-06 15:18:03,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:18:03,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:03,857 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) [2021-08-06 15:18:03,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 15:18:09,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:18:09,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:09,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:18:09,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:10,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5568646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:10,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:10,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:18:10,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462678238] [2021-08-06 15:18:10,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:18:10,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:18:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:18:10,612 INFO L87 Difference]: Start difference. First operand 617 states and 2366 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:18:10,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:10,964 INFO L93 Difference]: Finished difference Result 663 states and 2495 transitions. [2021-08-06 15:18:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:18:10,965 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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 [2021-08-06 15:18:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:10,966 INFO L225 Difference]: With dead ends: 663 [2021-08-06 15:18:10,966 INFO L226 Difference]: Without dead ends: 655 [2021-08-06 15:18:10,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 605.3ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:18:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-08-06 15:18:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 616. [2021-08-06 15:18:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.8308943089430896) internal successors, (2356), 615 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 2356 transitions. [2021-08-06 15:18:10,974 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 2356 transitions. Word has length 26 [2021-08-06 15:18:10,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:10,974 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 2356 transitions. [2021-08-06 15:18:10,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:18:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 2356 transitions. [2021-08-06 15:18:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:18:10,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:10,975 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:11,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 15:18:11,175 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,SelfDestructingSolverStorable122 [2021-08-06 15:18:11,175 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:11,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:11,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1347901829, now seen corresponding path program 85 times [2021-08-06 15:18:11,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:11,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550763893] [2021-08-06 15:18:11,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:11,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:11,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:11,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550763893] [2021-08-06 15:18:11,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550763893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:11,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883368554] [2021-08-06 15:18:11,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:18:11,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:11,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:11,508 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) [2021-08-06 15:18:11,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 15:18:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:17,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:18:17,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:18,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883368554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:18,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:18,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:18:18,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308655084] [2021-08-06 15:18:18,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:18:18,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:18,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:18:18,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:18:18,059 INFO L87 Difference]: Start difference. First operand 616 states and 2356 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:18:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:18,532 INFO L93 Difference]: Finished difference Result 675 states and 2537 transitions. [2021-08-06 15:18:18,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:18:18,533 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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 [2021-08-06 15:18:18,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:18,534 INFO L225 Difference]: With dead ends: 675 [2021-08-06 15:18:18,534 INFO L226 Difference]: Without dead ends: 670 [2021-08-06 15:18:18,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 697.6ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:18:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-08-06 15:18:18,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 630. [2021-08-06 15:18:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.8378378378378377) internal successors, (2414), 629 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 2414 transitions. [2021-08-06 15:18:18,544 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 2414 transitions. Word has length 26 [2021-08-06 15:18:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:18,544 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 2414 transitions. [2021-08-06 15:18:18,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:18:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 2414 transitions. [2021-08-06 15:18:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:18:18,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:18,545 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:18,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 15:18:18,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 15:18:18,746 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:18,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:18,746 INFO L82 PathProgramCache]: Analyzing trace with hash -554196693, now seen corresponding path program 86 times [2021-08-06 15:18:18,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:18,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339629134] [2021-08-06 15:18:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:18,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:19,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:19,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339629134] [2021-08-06 15:18:19,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339629134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:19,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723837238] [2021-08-06 15:18:19,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:18:19,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:19,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:19,101 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) [2021-08-06 15:18:19,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 15:18:24,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:18:24,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:24,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:18:24,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:25,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723837238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:25,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:25,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:18:25,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149195110] [2021-08-06 15:18:25,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:18:25,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:25,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:18:25,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:18:25,842 INFO L87 Difference]: Start difference. First operand 630 states and 2414 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:18:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:26,265 INFO L93 Difference]: Finished difference Result 685 states and 2587 transitions. [2021-08-06 15:18:26,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:18:26,265 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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 [2021-08-06 15:18:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:26,267 INFO L225 Difference]: With dead ends: 685 [2021-08-06 15:18:26,267 INFO L226 Difference]: Without dead ends: 676 [2021-08-06 15:18:26,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 696.5ms TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:18:26,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-08-06 15:18:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 658. [2021-08-06 15:18:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.800608828006088) internal successors, (2497), 657 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2497 transitions. [2021-08-06 15:18:26,276 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2497 transitions. Word has length 26 [2021-08-06 15:18:26,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:26,276 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2497 transitions. [2021-08-06 15:18:26,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:18:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2497 transitions. [2021-08-06 15:18:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:18:26,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:26,277 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:26,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-06 15:18:26,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:26,479 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:26,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1649383955, now seen corresponding path program 87 times [2021-08-06 15:18:26,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:26,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960554621] [2021-08-06 15:18:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:26,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:26,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:26,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960554621] [2021-08-06 15:18:26,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960554621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:26,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013151694] [2021-08-06 15:18:26,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:18:26,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:26,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:26,701 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) [2021-08-06 15:18:26,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 15:18:32,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:18:32,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:32,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:18:32,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:33,207 INFO L388 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 7 treesize of output 3 [2021-08-06 15:18:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:18:33,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013151694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:33,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:33,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:18:33,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652955367] [2021-08-06 15:18:33,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:18:33,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:33,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:18:33,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:18:33,772 INFO L87 Difference]: Start difference. First operand 658 states and 2497 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:36,201 INFO L93 Difference]: Finished difference Result 749 states and 2700 transitions. [2021-08-06 15:18:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:18:36,202 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:18:36,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:36,203 INFO L225 Difference]: With dead ends: 749 [2021-08-06 15:18:36,203 INFO L226 Difference]: Without dead ends: 739 [2021-08-06 15:18:36,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:18:36,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-08-06 15:18:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 653. [2021-08-06 15:18:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 3.7622699386503067) internal successors, (2453), 652 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 2453 transitions. [2021-08-06 15:18:36,212 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 2453 transitions. Word has length 26 [2021-08-06 15:18:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:36,212 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 2453 transitions. [2021-08-06 15:18:36,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 2453 transitions. [2021-08-06 15:18:36,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:18:36,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:36,213 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:36,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-06 15:18:36,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 15:18:36,414 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:36,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:36,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1546465287, now seen corresponding path program 88 times [2021-08-06 15:18:36,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:36,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861076145] [2021-08-06 15:18:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:36,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:36,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:36,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861076145] [2021-08-06 15:18:36,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861076145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:36,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848630888] [2021-08-06 15:18:36,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:18:36,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:36,749 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) [2021-08-06 15:18:36,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 15:18:42,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:18:42,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:42,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:18:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:43,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848630888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:43,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:43,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:18:43,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020509524] [2021-08-06 15:18:43,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:18:43,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:43,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:18:43,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:18:43,776 INFO L87 Difference]: Start difference. First operand 653 states and 2453 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:18:44,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:44,191 INFO L93 Difference]: Finished difference Result 708 states and 2626 transitions. [2021-08-06 15:18:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:18:44,191 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 [2021-08-06 15:18:44,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:44,193 INFO L225 Difference]: With dead ends: 708 [2021-08-06 15:18:44,193 INFO L226 Difference]: Without dead ends: 703 [2021-08-06 15:18:44,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 681.2ms TimeCoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:18:44,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-08-06 15:18:44,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 659. [2021-08-06 15:18:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 3.7537993920972643) internal successors, (2470), 658 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 2470 transitions. [2021-08-06 15:18:44,201 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 2470 transitions. Word has length 26 [2021-08-06 15:18:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:44,201 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 2470 transitions. [2021-08-06 15:18:44,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:18:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 2470 transitions. [2021-08-06 15:18:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:18:44,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:44,203 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:44,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 15:18:44,404 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,SelfDestructingSolverStorable126 [2021-08-06 15:18:44,405 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:44,405 INFO L82 PathProgramCache]: Analyzing trace with hash 780622281, now seen corresponding path program 89 times [2021-08-06 15:18:44,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:44,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21149933] [2021-08-06 15:18:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:44,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:44,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:44,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21149933] [2021-08-06 15:18:44,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21149933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:44,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451713203] [2021-08-06 15:18:44,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:18:44,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:44,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:44,726 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) [2021-08-06 15:18:44,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 15:18:50,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 15:18:50,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:18:50,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:51,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451713203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:51,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:51,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:18:51,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772278237] [2021-08-06 15:18:51,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:18:51,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:51,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:18:51,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:18:51,699 INFO L87 Difference]: Start difference. First operand 659 states and 2470 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:18:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:51,985 INFO L93 Difference]: Finished difference Result 720 states and 2686 transitions. [2021-08-06 15:18:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:18:51,986 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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 [2021-08-06 15:18:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:51,987 INFO L225 Difference]: With dead ends: 720 [2021-08-06 15:18:51,987 INFO L226 Difference]: Without dead ends: 712 [2021-08-06 15:18:51,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 559.1ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:18:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-08-06 15:18:51,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 673. [2021-08-06 15:18:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.7470238095238093) internal successors, (2518), 672 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2518 transitions. [2021-08-06 15:18:51,996 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2518 transitions. Word has length 26 [2021-08-06 15:18:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:51,997 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 2518 transitions. [2021-08-06 15:18:51,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:18:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2518 transitions. [2021-08-06 15:18:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:18:51,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:51,998 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:52,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-06 15:18:52,200 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,SelfDestructingSolverStorable127 [2021-08-06 15:18:52,201 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:52,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:52,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1121476241, now seen corresponding path program 90 times [2021-08-06 15:18:52,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:52,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962559998] [2021-08-06 15:18:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:52,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:18:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:18:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:52,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:18:52,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962559998] [2021-08-06 15:18:52,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962559998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:52,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303084372] [2021-08-06 15:18:52,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:18:52,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:18:52,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:18:52,483 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) [2021-08-06 15:18:52,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 15:18:58,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 15:18:58,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:18:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:18:58,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:18:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:18:59,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303084372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:18:59,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:18:59,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:18:59,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791129233] [2021-08-06 15:18:59,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:18:59,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:18:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:18:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:18:59,353 INFO L87 Difference]: Start difference. First operand 673 states and 2518 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:18:59,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:18:59,775 INFO L93 Difference]: Finished difference Result 728 states and 2691 transitions. [2021-08-06 15:18:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:18:59,775 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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 [2021-08-06 15:18:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:18:59,777 INFO L225 Difference]: With dead ends: 728 [2021-08-06 15:18:59,777 INFO L226 Difference]: Without dead ends: 723 [2021-08-06 15:18:59,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 687.2ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:18:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-08-06 15:18:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 681. [2021-08-06 15:18:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 3.7544117647058823) internal successors, (2553), 680 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:18:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2553 transitions. [2021-08-06 15:18:59,786 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2553 transitions. Word has length 26 [2021-08-06 15:18:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:18:59,787 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 2553 transitions. [2021-08-06 15:18:59,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:18:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2553 transitions. [2021-08-06 15:18:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:18:59,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:18:59,788 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:18:59,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 15:18:59,988 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,SelfDestructingSolverStorable128 [2021-08-06 15:18:59,988 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:18:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:18:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2078303793, now seen corresponding path program 91 times [2021-08-06 15:18:59,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:18:59,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931678240] [2021-08-06 15:18:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:18:59,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:19:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:19:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:00,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:19:00,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931678240] [2021-08-06 15:19:00,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931678240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:00,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808130655] [2021-08-06 15:19:00,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:19:00,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:19:00,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:19:00,300 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) [2021-08-06 15:19:00,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 15:19:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:19:06,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:19:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:19:06,874 INFO L388 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 7 treesize of output 3 [2021-08-06 15:19:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:07,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808130655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:07,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:19:07,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-08-06 15:19:07,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900577892] [2021-08-06 15:19:07,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:19:07,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:19:07,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:19:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:19:07,114 INFO L87 Difference]: Start difference. First operand 681 states and 2553 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:19:07,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:19:07,388 INFO L93 Difference]: Finished difference Result 723 states and 2612 transitions. [2021-08-06 15:19:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:19:07,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:19:07,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:19:07,390 INFO L225 Difference]: With dead ends: 723 [2021-08-06 15:19:07,390 INFO L226 Difference]: Without dead ends: 715 [2021-08-06 15:19:07,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 447.8ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:19:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-08-06 15:19:07,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 658. [2021-08-06 15:19:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.7519025875190257) internal successors, (2465), 657 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:19:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2465 transitions. [2021-08-06 15:19:07,399 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2465 transitions. Word has length 26 [2021-08-06 15:19:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:19:07,399 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2465 transitions. [2021-08-06 15:19:07,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:19:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2465 transitions. [2021-08-06 15:19:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:19:07,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:19:07,400 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:19:07,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 15:19:07,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:19:07,602 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:19:07,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:19:07,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1403496975, now seen corresponding path program 92 times [2021-08-06 15:19:07,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:19:07,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044792965] [2021-08-06 15:19:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:19:07,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:19:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:19:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:07,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:19:07,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044792965] [2021-08-06 15:19:07,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044792965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:07,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928359953] [2021-08-06 15:19:07,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:19:07,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:19:07,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:19:07,938 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) [2021-08-06 15:19:07,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 15:19:13,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:19:13,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:19:13,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:19:13,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:19:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:14,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928359953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:14,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:19:14,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:19:14,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569065027] [2021-08-06 15:19:14,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:19:14,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:19:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:19:14,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:19:14,948 INFO L87 Difference]: Start difference. First operand 658 states and 2465 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:19:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:19:15,368 INFO L93 Difference]: Finished difference Result 740 states and 2739 transitions. [2021-08-06 15:19:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:19:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 [2021-08-06 15:19:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:19:15,370 INFO L225 Difference]: With dead ends: 740 [2021-08-06 15:19:15,370 INFO L226 Difference]: Without dead ends: 730 [2021-08-06 15:19:15,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 715.4ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:19:15,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-08-06 15:19:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 677. [2021-08-06 15:19:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.739644970414201) internal successors, (2528), 676 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:19:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2528 transitions. [2021-08-06 15:19:15,378 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2528 transitions. Word has length 26 [2021-08-06 15:19:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:19:15,378 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 2528 transitions. [2021-08-06 15:19:15,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:19:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2528 transitions. [2021-08-06 15:19:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:19:15,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:19:15,380 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:19:15,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 15:19:15,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:19:15,580 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:19:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:19:15,580 INFO L82 PathProgramCache]: Analyzing trace with hash 979185739, now seen corresponding path program 93 times [2021-08-06 15:19:15,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:19:15,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492437749] [2021-08-06 15:19:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:19:15,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:19:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:19:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:15,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:19:15,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492437749] [2021-08-06 15:19:15,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492437749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:15,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129799537] [2021-08-06 15:19:15,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:19:15,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:19:15,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:19:15,871 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) [2021-08-06 15:19:15,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 15:19:21,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:19:21,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:19:21,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:19:21,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:19:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:23,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129799537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:23,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:19:23,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:19:23,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252575450] [2021-08-06 15:19:23,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:19:23,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:19:23,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:19:23,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:19:23,116 INFO L87 Difference]: Start difference. First operand 677 states and 2528 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:19:23,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:19:23,577 INFO L93 Difference]: Finished difference Result 723 states and 2671 transitions. [2021-08-06 15:19:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:19:23,577 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 [2021-08-06 15:19:23,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:19:23,578 INFO L225 Difference]: With dead ends: 723 [2021-08-06 15:19:23,578 INFO L226 Difference]: Without dead ends: 718 [2021-08-06 15:19:23,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 753.3ms TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:19:23,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-08-06 15:19:23,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 668. [2021-08-06 15:19:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 3.745127436281859) internal successors, (2498), 667 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:19:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2498 transitions. [2021-08-06 15:19:23,587 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2498 transitions. Word has length 26 [2021-08-06 15:19:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:19:23,587 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 2498 transitions. [2021-08-06 15:19:23,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:19:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2498 transitions. [2021-08-06 15:19:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:19:23,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:19:23,588 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:19:23,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 15:19:23,789 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,SelfDestructingSolverStorable131 [2021-08-06 15:19:23,789 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:19:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:19:23,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1689121751, now seen corresponding path program 94 times [2021-08-06 15:19:23,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:19:23,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091983359] [2021-08-06 15:19:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:19:23,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:19:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:19:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:24,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:19:24,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091983359] [2021-08-06 15:19:24,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091983359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:24,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434567610] [2021-08-06 15:19:24,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:19:24,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:19:24,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:19:24,035 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) [2021-08-06 15:19:24,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 15:19:30,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:19:30,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:19:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:19:30,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:19:30,819 INFO L388 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 7 treesize of output 3 [2021-08-06 15:19:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:19:31,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434567610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:31,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:19:31,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-08-06 15:19:31,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064895342] [2021-08-06 15:19:31,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:19:31,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:19:31,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:19:31,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:19:31,043 INFO L87 Difference]: Start difference. First operand 668 states and 2498 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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) [2021-08-06 15:19:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:19:31,290 INFO L93 Difference]: Finished difference Result 671 states and 2478 transitions. [2021-08-06 15:19:31,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:19:31,290 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 [2021-08-06 15:19:31,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:19:31,291 INFO L225 Difference]: With dead ends: 671 [2021-08-06 15:19:31,291 INFO L226 Difference]: Without dead ends: 663 [2021-08-06 15:19:31,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 439.1ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:19:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-06 15:19:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 653. [2021-08-06 15:19:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 3.745398773006135) internal successors, (2442), 652 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:19:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 2442 transitions. [2021-08-06 15:19:31,300 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 2442 transitions. Word has length 26 [2021-08-06 15:19:31,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:19:31,300 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 2442 transitions. [2021-08-06 15:19:31,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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) [2021-08-06 15:19:31,300 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 2442 transitions. [2021-08-06 15:19:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:19:31,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:19:31,301 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:19:31,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-06 15:19:31,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:19:31,502 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:19:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:19:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1931038727, now seen corresponding path program 95 times [2021-08-06 15:19:31,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:19:31,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026219435] [2021-08-06 15:19:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:19:31,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:19:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:19:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:31,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:19:31,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026219435] [2021-08-06 15:19:31,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026219435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:31,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456745877] [2021-08-06 15:19:31,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:19:31,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:19:31,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:19:31,878 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) [2021-08-06 15:19:31,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 15:19:38,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:19:38,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:19:38,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:19:38,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:19:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:39,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456745877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:39,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:19:39,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:19:39,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842079188] [2021-08-06 15:19:39,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:19:39,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:19:39,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:19:39,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:19:39,207 INFO L87 Difference]: Start difference. First operand 653 states and 2442 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:19:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:19:39,387 INFO L93 Difference]: Finished difference Result 694 states and 2575 transitions. [2021-08-06 15:19:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:19:39,388 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 [2021-08-06 15:19:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:19:39,389 INFO L225 Difference]: With dead ends: 694 [2021-08-06 15:19:39,389 INFO L226 Difference]: Without dead ends: 686 [2021-08-06 15:19:39,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 464.5ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:19:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-08-06 15:19:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 647. [2021-08-06 15:19:39,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 3.7492260061919507) internal successors, (2422), 646 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:19:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 2422 transitions. [2021-08-06 15:19:39,397 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 2422 transitions. Word has length 26 [2021-08-06 15:19:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:19:39,398 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 2422 transitions. [2021-08-06 15:19:39,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:19:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 2422 transitions. [2021-08-06 15:19:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:19:39,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:19:39,399 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:19:39,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-06 15:19:39,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:19:39,599 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:19:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:19:39,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1662292299, now seen corresponding path program 96 times [2021-08-06 15:19:39,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:19:39,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001435550] [2021-08-06 15:19:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:19:39,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:19:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:19:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:40,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:19:40,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001435550] [2021-08-06 15:19:40,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001435550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:40,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134648691] [2021-08-06 15:19:40,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:19:40,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:19:40,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:19:40,108 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) [2021-08-06 15:19:40,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 15:19:46,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:19:46,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:19:46,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:19:46,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:19:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:47,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134648691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:47,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:19:47,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:19:47,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985882552] [2021-08-06 15:19:47,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:19:47,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:19:47,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:19:47,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:19:47,498 INFO L87 Difference]: Start difference. First operand 647 states and 2422 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:19:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:19:48,299 INFO L93 Difference]: Finished difference Result 753 states and 2765 transitions. [2021-08-06 15:19:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:19:48,300 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 [2021-08-06 15:19:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:19:48,301 INFO L225 Difference]: With dead ends: 753 [2021-08-06 15:19:48,301 INFO L226 Difference]: Without dead ends: 736 [2021-08-06 15:19:48,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1090.6ms TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:19:48,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-08-06 15:19:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 655. [2021-08-06 15:19:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 3.7446483180428136) internal successors, (2449), 654 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:19:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 2449 transitions. [2021-08-06 15:19:48,310 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 2449 transitions. Word has length 26 [2021-08-06 15:19:48,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:19:48,310 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 2449 transitions. [2021-08-06 15:19:48,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:19:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 2449 transitions. [2021-08-06 15:19:48,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:19:48,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:19:48,311 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:19:48,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-06 15:19:48,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 15:19:48,512 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:19:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:19:48,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1237981063, now seen corresponding path program 97 times [2021-08-06 15:19:48,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:19:48,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440189468] [2021-08-06 15:19:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:19:48,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:19:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:19:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:48,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:19:48,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440189468] [2021-08-06 15:19:48,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440189468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:48,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949793946] [2021-08-06 15:19:48,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:19:48,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:19:48,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:19:48,900 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) [2021-08-06 15:19:48,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 15:19:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:19:55,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:19:55,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:19:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:56,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949793946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:56,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:19:56,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:19:56,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840224913] [2021-08-06 15:19:56,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:19:56,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:19:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:19:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:19:56,374 INFO L87 Difference]: Start difference. First operand 655 states and 2449 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:19:56,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:19:56,656 INFO L93 Difference]: Finished difference Result 692 states and 2571 transitions. [2021-08-06 15:19:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:19:56,657 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 [2021-08-06 15:19:56,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:19:56,658 INFO L225 Difference]: With dead ends: 692 [2021-08-06 15:19:56,658 INFO L226 Difference]: Without dead ends: 687 [2021-08-06 15:19:56,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 730.1ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:19:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-08-06 15:19:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 637. [2021-08-06 15:19:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.770440251572327) internal successors, (2398), 636 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:19:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2398 transitions. [2021-08-06 15:19:56,666 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2398 transitions. Word has length 26 [2021-08-06 15:19:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:19:56,666 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 2398 transitions. [2021-08-06 15:19:56,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:19:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2398 transitions. [2021-08-06 15:19:56,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:19:56,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:19:56,668 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:19:56,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-06 15:19:56,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 15:19:56,868 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:19:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:19:56,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1909838259, now seen corresponding path program 98 times [2021-08-06 15:19:56,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:19:56,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563607627] [2021-08-06 15:19:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:19:56,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:19:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:19:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:19:57,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:19:57,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563607627] [2021-08-06 15:19:57,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563607627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:19:57,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593989314] [2021-08-06 15:19:57,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:19:57,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:19:57,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:19:57,114 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) [2021-08-06 15:19:57,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 15:20:03,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:20:03,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:20:03,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:20:03,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:20:04,217 INFO L388 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 7 treesize of output 3 [2021-08-06 15:20:04,221 INFO L388 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 7 treesize of output 3 [2021-08-06 15:20:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:20:05,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593989314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:05,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:20:05,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-08-06 15:20:05,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180937603] [2021-08-06 15:20:05,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:20:05,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:20:05,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:20:05,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:20:05,735 INFO L87 Difference]: Start difference. First operand 637 states and 2398 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 15:20:06,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:20:06,168 INFO L93 Difference]: Finished difference Result 779 states and 2800 transitions. [2021-08-06 15:20:06,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:20:06,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-08-06 15:20:06,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:20:06,170 INFO L225 Difference]: With dead ends: 779 [2021-08-06 15:20:06,170 INFO L226 Difference]: Without dead ends: 772 [2021-08-06 15:20:06,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 977.6ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:20:06,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-08-06 15:20:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 695. [2021-08-06 15:20:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.7406340057636887) internal successors, (2596), 694 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:20:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2596 transitions. [2021-08-06 15:20:06,179 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2596 transitions. Word has length 26 [2021-08-06 15:20:06,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:20:06,179 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 2596 transitions. [2021-08-06 15:20:06,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-08-06 15:20:06,179 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2596 transitions. [2021-08-06 15:20:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:20:06,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:20:06,180 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:20:06,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-06 15:20:06,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 15:20:06,381 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:20:06,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:20:06,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1083425563, now seen corresponding path program 99 times [2021-08-06 15:20:06,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:20:06,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437478512] [2021-08-06 15:20:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:20:06,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:20:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:20:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:20:06,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:20:06,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437478512] [2021-08-06 15:20:06,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437478512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:06,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60196709] [2021-08-06 15:20:06,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:20:06,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:20:06,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:20:06,646 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) [2021-08-06 15:20:06,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 15:20:13,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:20:13,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:20:13,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:20:13,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:20:13,734 INFO L388 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 7 treesize of output 3 [2021-08-06 15:20:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:20:14,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60196709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:14,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:20:14,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-08-06 15:20:14,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098801713] [2021-08-06 15:20:14,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:20:14,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:20:14,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:20:14,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:20:14,197 INFO L87 Difference]: Start difference. First operand 695 states and 2596 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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) [2021-08-06 15:20:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:20:14,606 INFO L93 Difference]: Finished difference Result 658 states and 2296 transitions. [2021-08-06 15:20:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:20:14,606 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 [2021-08-06 15:20:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:20:14,608 INFO L225 Difference]: With dead ends: 658 [2021-08-06 15:20:14,608 INFO L226 Difference]: Without dead ends: 650 [2021-08-06 15:20:14,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 582.5ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:20:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-08-06 15:20:14,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 636. [2021-08-06 15:20:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 3.5448818897637797) internal successors, (2251), 635 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:20:14,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 2251 transitions. [2021-08-06 15:20:14,616 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 2251 transitions. Word has length 26 [2021-08-06 15:20:14,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:20:14,616 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 2251 transitions. [2021-08-06 15:20:14,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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) [2021-08-06 15:20:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 2251 transitions. [2021-08-06 15:20:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:20:14,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:20:14,617 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:20:14,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-06 15:20:14,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:20:14,817 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:20:14,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:20:14,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1273209923, now seen corresponding path program 100 times [2021-08-06 15:20:14,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:20:14,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482880856] [2021-08-06 15:20:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:20:14,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:20:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:20:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:20:15,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:20:15,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482880856] [2021-08-06 15:20:15,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482880856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:15,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482034837] [2021-08-06 15:20:15,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:20:15,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:20:15,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:20:15,128 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) [2021-08-06 15:20:15,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 15:20:21,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:20:21,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:20:21,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:20:21,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:20:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:20:22,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482034837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:22,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:20:22,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:20:22,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237138202] [2021-08-06 15:20:22,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:20:22,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:20:22,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:20:22,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:20:22,657 INFO L87 Difference]: Start difference. First operand 636 states and 2251 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:20:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:20:22,955 INFO L93 Difference]: Finished difference Result 697 states and 2445 transitions. [2021-08-06 15:20:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:20:22,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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 [2021-08-06 15:20:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:20:22,957 INFO L225 Difference]: With dead ends: 697 [2021-08-06 15:20:22,957 INFO L226 Difference]: Without dead ends: 692 [2021-08-06 15:20:22,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 541.0ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:20:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-08-06 15:20:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 646. [2021-08-06 15:20:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 3.545736434108527) internal successors, (2287), 645 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:20:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 2287 transitions. [2021-08-06 15:20:22,965 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 2287 transitions. Word has length 26 [2021-08-06 15:20:22,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:20:22,965 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 2287 transitions. [2021-08-06 15:20:22,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:20:22,965 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 2287 transitions. [2021-08-06 15:20:22,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:20:22,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:20:22,966 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:20:23,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 15:20:23,168 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,SelfDestructingSolverStorable138 [2021-08-06 15:20:23,169 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:20:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:20:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1331814469, now seen corresponding path program 101 times [2021-08-06 15:20:23,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:20:23,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824003952] [2021-08-06 15:20:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:20:23,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:20:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:20:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:20:23,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:20:23,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824003952] [2021-08-06 15:20:23,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824003952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:23,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926099663] [2021-08-06 15:20:23,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:20:23,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:20:23,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:20:23,488 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) [2021-08-06 15:20:23,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 15:20:30,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:20:30,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:20:30,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:20:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:20:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:20:31,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926099663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:31,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:20:31,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:20:31,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129801688] [2021-08-06 15:20:31,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:20:31,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:20:31,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:20:31,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:20:31,354 INFO L87 Difference]: Start difference. First operand 646 states and 2287 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:20:31,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:20:31,720 INFO L93 Difference]: Finished difference Result 699 states and 2447 transitions. [2021-08-06 15:20:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:20:31,720 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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 [2021-08-06 15:20:31,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:20:31,722 INFO L225 Difference]: With dead ends: 699 [2021-08-06 15:20:31,722 INFO L226 Difference]: Without dead ends: 694 [2021-08-06 15:20:31,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 635.5ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:20:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-08-06 15:20:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 646. [2021-08-06 15:20:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 3.545736434108527) internal successors, (2287), 645 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:20:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 2287 transitions. [2021-08-06 15:20:31,730 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 2287 transitions. Word has length 26 [2021-08-06 15:20:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:20:31,730 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 2287 transitions. [2021-08-06 15:20:31,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:20:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 2287 transitions. [2021-08-06 15:20:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:20:31,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:20:31,731 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:20:31,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-06 15:20:31,943 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,SelfDestructingSolverStorable139 [2021-08-06 15:20:31,944 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:20:31,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:20:31,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1620918419, now seen corresponding path program 102 times [2021-08-06 15:20:31,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:20:31,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000009827] [2021-08-06 15:20:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:20:31,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:20:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:20:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:20:32,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:20:32,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000009827] [2021-08-06 15:20:32,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000009827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:32,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156126409] [2021-08-06 15:20:32,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:20:32,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:20:32,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:20:32,270 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) [2021-08-06 15:20:32,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 15:20:38,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:20:38,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:20:38,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:20:38,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:20:39,686 INFO L388 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 7 treesize of output 3 [2021-08-06 15:20:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:20:40,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156126409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:40,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:20:40,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:20:40,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531038890] [2021-08-06 15:20:40,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:20:40,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:20:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:20:40,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:20:40,280 INFO L87 Difference]: Start difference. First operand 646 states and 2287 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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) [2021-08-06 15:20:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:20:40,825 INFO L93 Difference]: Finished difference Result 776 states and 2646 transitions. [2021-08-06 15:20:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:20:40,825 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 [2021-08-06 15:20:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:20:40,827 INFO L225 Difference]: With dead ends: 776 [2021-08-06 15:20:40,827 INFO L226 Difference]: Without dead ends: 764 [2021-08-06 15:20:40,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 739.9ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:20:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-08-06 15:20:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 624. [2021-08-06 15:20:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 3.5136436597110756) internal successors, (2189), 623 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:20:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2189 transitions. [2021-08-06 15:20:40,835 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2189 transitions. Word has length 26 [2021-08-06 15:20:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:20:40,835 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 2189 transitions. [2021-08-06 15:20:40,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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) [2021-08-06 15:20:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2189 transitions. [2021-08-06 15:20:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:20:40,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:20:40,837 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:20:40,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-06 15:20:41,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:20:41,037 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:20:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:20:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash 942105025, now seen corresponding path program 103 times [2021-08-06 15:20:41,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:20:41,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33303067] [2021-08-06 15:20:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:20:41,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:20:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:20:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:20:41,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:20:41,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33303067] [2021-08-06 15:20:41,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33303067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:41,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865167944] [2021-08-06 15:20:41,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:20:41,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:20:41,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:20:41,349 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) [2021-08-06 15:20:41,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 15:20:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:20:48,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:20:48,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:20:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:20:49,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865167944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:49,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:20:49,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:20:49,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131765398] [2021-08-06 15:20:49,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:20:49,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:20:49,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:20:49,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:20:49,108 INFO L87 Difference]: Start difference. First operand 624 states and 2189 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:20:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:20:49,569 INFO L93 Difference]: Finished difference Result 681 states and 2373 transitions. [2021-08-06 15:20:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:20:49,570 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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 [2021-08-06 15:20:49,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:20:49,571 INFO L225 Difference]: With dead ends: 681 [2021-08-06 15:20:49,571 INFO L226 Difference]: Without dead ends: 676 [2021-08-06 15:20:49,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:20:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-08-06 15:20:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 630. [2021-08-06 15:20:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.521462639109698) internal successors, (2215), 629 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:20:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 2215 transitions. [2021-08-06 15:20:49,579 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 2215 transitions. Word has length 26 [2021-08-06 15:20:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:20:49,579 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 2215 transitions. [2021-08-06 15:20:49,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:20:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 2215 transitions. [2021-08-06 15:20:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:20:49,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:20:49,580 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:20:49,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-06 15:20:49,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:20:49,797 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:20:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:20:49,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1362123095, now seen corresponding path program 104 times [2021-08-06 15:20:49,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:20:49,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968407333] [2021-08-06 15:20:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:20:49,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:20:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:20:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:20:49,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:20:49,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968407333] [2021-08-06 15:20:49,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968407333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:49,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550784643] [2021-08-06 15:20:49,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:20:49,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:20:49,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:20:49,999 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) [2021-08-06 15:20:50,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 15:20:56,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:20:56,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:20:56,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:20:56,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:20:57,484 INFO L388 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 7 treesize of output 3 [2021-08-06 15:20:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:20:58,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550784643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:20:58,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:20:58,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:20:58,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329382805] [2021-08-06 15:20:58,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:20:58,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:20:58,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:20:58,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:20:58,100 INFO L87 Difference]: Start difference. First operand 630 states and 2215 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:21:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:21:00,533 INFO L93 Difference]: Finished difference Result 670 states and 2274 transitions. [2021-08-06 15:21:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:21:00,533 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:21:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:21:00,534 INFO L225 Difference]: With dead ends: 670 [2021-08-06 15:21:00,534 INFO L226 Difference]: Without dead ends: 662 [2021-08-06 15:21:00,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 575.9ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:21:00,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-08-06 15:21:00,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 606. [2021-08-06 15:21:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.5041322314049586) internal successors, (2120), 605 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:21:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2120 transitions. [2021-08-06 15:21:00,542 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2120 transitions. Word has length 26 [2021-08-06 15:21:00,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:21:00,542 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 2120 transitions. [2021-08-06 15:21:00,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:21:00,542 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2120 transitions. [2021-08-06 15:21:00,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:21:00,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:21:00,543 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:21:00,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-06 15:21:00,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:21:00,743 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:21:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:21:00,744 INFO L82 PathProgramCache]: Analyzing trace with hash -959993497, now seen corresponding path program 105 times [2021-08-06 15:21:00,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:21:00,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863070535] [2021-08-06 15:21:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:21:00,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:21:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:21:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:21:01,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:21:01,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863070535] [2021-08-06 15:21:01,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863070535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:21:01,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805945507] [2021-08-06 15:21:01,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:21:01,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:21:01,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:21:01,056 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) [2021-08-06 15:21:01,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 15:21:07,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:21:07,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:21:07,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:21:07,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:21:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:21:08,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805945507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:21:08,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:21:08,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:21:08,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516613241] [2021-08-06 15:21:08,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:21:08,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:21:08,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:21:08,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:21:08,890 INFO L87 Difference]: Start difference. First operand 606 states and 2120 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:21:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:21:09,713 INFO L93 Difference]: Finished difference Result 859 states and 2979 transitions. [2021-08-06 15:21:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:21:09,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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 [2021-08-06 15:21:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:21:09,715 INFO L225 Difference]: With dead ends: 859 [2021-08-06 15:21:09,715 INFO L226 Difference]: Without dead ends: 844 [2021-08-06 15:21:09,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 859.9ms TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:21:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-08-06 15:21:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 654. [2021-08-06 15:21:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 3.5834609494640124) internal successors, (2340), 653 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:21:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 2340 transitions. [2021-08-06 15:21:09,725 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 2340 transitions. Word has length 26 [2021-08-06 15:21:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:21:09,725 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 2340 transitions. [2021-08-06 15:21:09,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 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) [2021-08-06 15:21:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 2340 transitions. [2021-08-06 15:21:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:21:09,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:21:09,726 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:21:09,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 15:21:09,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:21:09,948 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:21:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:21:09,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2055180759, now seen corresponding path program 106 times [2021-08-06 15:21:09,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:21:09,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275933390] [2021-08-06 15:21:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:21:09,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:21:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:21:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:21:10,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:21:10,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275933390] [2021-08-06 15:21:10,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275933390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:21:10,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058224704] [2021-08-06 15:21:10,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:21:10,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:21:10,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:21:10,173 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) [2021-08-06 15:21:10,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 15:21:16,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:21:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:21:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:21:16,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:21:17,781 INFO L388 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 7 treesize of output 3 [2021-08-06 15:21:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:21:18,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058224704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:21:18,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:21:18,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-06 15:21:18,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636323109] [2021-08-06 15:21:18,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:21:18,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:21:18,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:21:18,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:21:18,341 INFO L87 Difference]: Start difference. First operand 654 states and 2340 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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) [2021-08-06 15:21:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:21:18,606 INFO L93 Difference]: Finished difference Result 718 states and 2486 transitions. [2021-08-06 15:21:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:21:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 [2021-08-06 15:21:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:21:18,607 INFO L225 Difference]: With dead ends: 718 [2021-08-06 15:21:18,607 INFO L226 Difference]: Without dead ends: 710 [2021-08-06 15:21:18,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:21:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-08-06 15:21:18,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 637. [2021-08-06 15:21:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.580188679245283) internal successors, (2277), 636 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:21:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2277 transitions. [2021-08-06 15:21:18,619 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2277 transitions. Word has length 26 [2021-08-06 15:21:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:21:18,619 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 2277 transitions. [2021-08-06 15:21:18,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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) [2021-08-06 15:21:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2277 transitions. [2021-08-06 15:21:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:21:18,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:21:18,621 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:21:18,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-06 15:21:18,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 15:21:18,837 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:21:18,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:21:18,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1564979719, now seen corresponding path program 107 times [2021-08-06 15:21:18,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:21:18,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249818811] [2021-08-06 15:21:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:21:18,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:21:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:21:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:21:19,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:21:19,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249818811] [2021-08-06 15:21:19,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249818811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:21:19,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622731308] [2021-08-06 15:21:19,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:21:19,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:21:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:21:19,197 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) [2021-08-06 15:21:19,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 15:21:26,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 15:21:26,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:21:26,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:21:26,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:21:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:21:27,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622731308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:21:27,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:21:27,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:21:27,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786135408] [2021-08-06 15:21:27,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:21:27,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:21:27,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:21:27,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:21:27,199 INFO L87 Difference]: Start difference. First operand 637 states and 2277 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:21:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:21:27,926 INFO L93 Difference]: Finished difference Result 843 states and 2935 transitions. [2021-08-06 15:21:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:21:27,927 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 [2021-08-06 15:21:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:21:27,928 INFO L225 Difference]: With dead ends: 843 [2021-08-06 15:21:27,928 INFO L226 Difference]: Without dead ends: 827 [2021-08-06 15:21:27,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 961.8ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:21:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-08-06 15:21:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 669. [2021-08-06 15:21:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.6302395209580838) internal successors, (2425), 668 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:21:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2425 transitions. [2021-08-06 15:21:27,942 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2425 transitions. Word has length 26 [2021-08-06 15:21:27,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:21:27,942 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 2425 transitions. [2021-08-06 15:21:27,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:21:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2425 transitions. [2021-08-06 15:21:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:21:27,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:21:27,943 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:21:27,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-06 15:21:28,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 15:21:28,145 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:21:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:21:28,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1140668483, now seen corresponding path program 108 times [2021-08-06 15:21:28,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:21:28,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021066760] [2021-08-06 15:21:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:21:28,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:21:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:21:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:21:28,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:21:28,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021066760] [2021-08-06 15:21:28,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021066760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:21:28,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791449264] [2021-08-06 15:21:28,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:21:28,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:21:28,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:21:28,456 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) [2021-08-06 15:21:28,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 15:21:35,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:21:35,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:21:35,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:21:35,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:21:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:21:36,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791449264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:21:36,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:21:36,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:21:36,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800159351] [2021-08-06 15:21:36,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:21:36,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:21:36,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:21:36,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:21:36,764 INFO L87 Difference]: Start difference. First operand 669 states and 2425 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:21:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:21:37,108 INFO L93 Difference]: Finished difference Result 712 states and 2562 transitions. [2021-08-06 15:21:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:21:37,108 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 [2021-08-06 15:21:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:21:37,110 INFO L225 Difference]: With dead ends: 712 [2021-08-06 15:21:37,110 INFO L226 Difference]: Without dead ends: 707 [2021-08-06 15:21:37,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 638.7ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:21:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-08-06 15:21:37,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 657. [2021-08-06 15:21:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.6417682926829267) internal successors, (2389), 656 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:21:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2389 transitions. [2021-08-06 15:21:37,128 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2389 transitions. Word has length 26 [2021-08-06 15:21:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:21:37,128 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 2389 transitions. [2021-08-06 15:21:37,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:21:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2389 transitions. [2021-08-06 15:21:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:21:37,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:21:37,129 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:21:37,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-06 15:21:37,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 15:21:37,330 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:21:37,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:21:37,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1817849489, now seen corresponding path program 109 times [2021-08-06 15:21:37,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:21:37,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565856168] [2021-08-06 15:21:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:21:37,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:21:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:21:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:21:37,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:21:37,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565856168] [2021-08-06 15:21:37,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565856168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:21:37,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737736025] [2021-08-06 15:21:37,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:21:37,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:21:37,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:21:37,513 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) [2021-08-06 15:21:37,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 15:21:42,247 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:21:42,247 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 [2021-08-06 15:21:43,262 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:21:43,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-06 15:21:43,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-06 15:21:43,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:21:43,463 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 5,while executing Executor. [2021-08-06 15:21:43,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:21:43,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:21:43,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 15:21:43,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-06 15:21:43,469 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:21:43,469 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:21:43,470 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:21:43 BasicIcfg [2021-08-06 15:21:43,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:21:43,471 INFO L168 Benchmark]: Toolchain (without parser) took 692567.53 ms. Allocated memory was 197.1 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 177.6 MB in the beginning and 235.7 MB in the end (delta: -58.1 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-08-06 15:21:43,471 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 197.1 MB. Free memory was 179.0 MB in the beginning and 178.9 MB in the end (delta: 132.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:21:43,471 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.93 ms. Allocated memory is still 197.1 MB. Free memory was 177.5 MB in the beginning and 176.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:21:43,471 INFO L168 Benchmark]: Boogie Preprocessor took 30.27 ms. Allocated memory is still 197.1 MB. Free memory was 176.0 MB in the beginning and 174.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:21:43,471 INFO L168 Benchmark]: RCFGBuilder took 572.73 ms. Allocated memory is still 197.1 MB. Free memory was 174.7 MB in the beginning and 173.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 34.7 MB. Max. memory is 8.0 GB. [2021-08-06 15:21:43,471 INFO L168 Benchmark]: TraceAbstraction took 691932.64 ms. Allocated memory was 197.1 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 172.5 MB in the beginning and 235.7 MB in the end (delta: -63.2 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-08-06 15:21:43,471 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 0.13 ms. Allocated memory is still 197.1 MB. Free memory was 179.0 MB in the beginning and 178.9 MB in the end (delta: 132.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.93 ms. Allocated memory is still 197.1 MB. Free memory was 177.5 MB in the beginning and 176.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.27 ms. Allocated memory is still 197.1 MB. Free memory was 176.0 MB in the beginning and 174.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 572.73 ms. Allocated memory is still 197.1 MB. Free memory was 174.7 MB in the beginning and 173.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 34.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 691932.64 ms. Allocated memory was 197.1 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 172.5 MB in the beginning and 235.7 MB in the end (delta: -63.2 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 172]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 5,while executing Executor. - TimeoutResultAtElement [Line: 164]: 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 27 with TraceHistMax 5,while executing Executor. - TimeoutResultAtElement [Line: 163]: 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 27 with TraceHistMax 5,while executing Executor. - TimeoutResultAtElement [Line: 165]: 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 27 with TraceHistMax 5,while executing Executor. - TimeoutResultAtElement [Line: 163]: 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 27 with TraceHistMax 5,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 34 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 691858.2ms, OverallIterations: 148, TraceHistogramMax: 6, EmptinessCheckTime: 206.9ms, AutomataDifference: 50295.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4939 SDtfs, 7820 SDslu, 54125 SDs, 0 SdLazy, 29278 SolverSat, 2166 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 21083.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5445 GetRequests, 2236 SyntacticMatches, 0 SemanticMatches, 3209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12951 ImplicationChecksByTransitivity, 66728.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1029occurred in iteration=31, InterpolantAutomatonStates: 1908, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1679.1ms AutomataMinimizationTime, 147 MinimizatonAttempts, 12721 StatesRemovedByMinimization, 142 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1176.0ms SsaConstructionTime, 3976.0ms SatisfiabilityAnalysisTime, 160910.7ms InterpolantComputationTime, 6847 NumberOfCodeBlocks, 6844 NumberOfCodeBlocksAsserted, 604 NumberOfCheckSat, 6556 ConstructedInterpolants, 347 QuantifiedInterpolants, 101595 SizeOfPredicates, 1667 NumberOfNonLiveVariables, 10597 ConjunctsInSsa, 2405 ConjunctsInUnsatCore, 291 InterpolantComputations, 4 PerfectInterpolantSequences, 646/5254 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