/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-more/min-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:24:58,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:24:58,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:24:58,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 15:24:58,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 15:24:58,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 15:24:58,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 15:24:58,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 15:24:58,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 15:24:58,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 15:24:58,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 15:24:58,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 15:24:58,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 15:24:58,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 15:24:58,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 15:24:58,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 15:24:58,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 15:24:58,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 15:24:58,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 15:24:58,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 15:24:58,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 15:24:58,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 15:24:58,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 15:24:58,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 15:24:58,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-06 15:24:58,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-06 15:24:58,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-06 15:24:58,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-06 15:24:58,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-06 15:24:58,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-06 15:24:58,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 15:24:58,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 15:24:58,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 15:24:58,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 15:24:58,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 15:24:58,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 15:24:58,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 15:24:58,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 15:24:58,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 15:24:58,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 15:24:58,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 15:24:58,563 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 15:24:58,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:24:58,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:24:58,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:24:58,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:24:58,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:24:58,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:24:58,586 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:24:58,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:24:58,586 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:24:58,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:24:58,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:24:58,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:24:58,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:24:58,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:24:58,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:24:58,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:24:58,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:24:58,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:24:58,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:24:58,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:24:58,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:24:58,588 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:24:58,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:24:58,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:24:58,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:24:58,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:24:58,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:24:58,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:24:58,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:24:58,589 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:24:58,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:24:58,590 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:24:58,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:24:58,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:24:58,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:24:58,929 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:24:58,931 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:24:58,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl [2021-08-06 15:24:58,932 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl' [2021-08-06 15:24:58,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:24:58,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:24:58,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:24:58,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:24:58,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:24:58,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:24:58" (1/1) ... [2021-08-06 15:24:58,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:24:58" (1/1) ... [2021-08-06 15:24:58,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:24:59,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:24:59,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:24:59,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:24:59,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:24:58" (1/1) ... [2021-08-06 15:24:59,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:24:58" (1/1) ... [2021-08-06 15:24:59,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:24:58" (1/1) ... [2021-08-06 15:24:59,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:24:58" (1/1) ... [2021-08-06 15:24:59,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:24:58" (1/1) ... [2021-08-06 15:24:59,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:24:58" (1/1) ... [2021-08-06 15:24:59,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:24:58" (1/1) ... [2021-08-06 15:24:59,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:24:59,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:24:59,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:24:59,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:24:59,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:24:58" (1/1) ... [2021-08-06 15:24:59,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:24:59,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:59,066 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 15:24:59,091 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 15:24:59,110 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:24:59,110 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:24:59,110 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:24:59,110 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:24:59,110 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:24:59,110 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:24:59,111 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:24:59,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:24:59,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:24:59,111 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 15:24:59,111 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 15:24:59,111 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 15:24:59,112 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 15:24:59,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:24:59,277 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:24:59,278 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:24:59 BoogieIcfgContainer [2021-08-06 15:24:59,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:24:59,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:24:59,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:24:59,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:24:59,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:24:58" (1/2) ... [2021-08-06 15:24:59,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dca40 and model type min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:24:59, skipping insertion in model container [2021-08-06 15:24:59,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:24:59" (2/2) ... [2021-08-06 15:24:59,284 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun.wvr.bpl [2021-08-06 15:24:59,288 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:24:59,288 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:24:59,288 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:24:59,288 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:24:59,319 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 15:24:59,354 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:24:59,359 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 15:24:59,359 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 15:24:59,367 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-08-06 15:24:59,386 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 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 15:24:59,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 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 15:24:59,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:24:59,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:59,397 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 15:24:59,397 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:59,402 INFO L82 PathProgramCache]: Analyzing trace with hash 541406590, now seen corresponding path program 1 times [2021-08-06 15:24:59,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:59,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799384661] [2021-08-06 15:24:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:59,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:59,606 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 15:24:59,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:59,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799384661] [2021-08-06 15:24:59,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799384661] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:24:59,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:24:59,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:24:59,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914910913] [2021-08-06 15:24:59,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:24:59,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:59,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:24:59,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:24:59,625 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 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) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:59,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:59,667 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-08-06 15:24:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:24:59,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 15:24:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:59,688 INFO L225 Difference]: With dead ends: 217 [2021-08-06 15:24:59,688 INFO L226 Difference]: Without dead ends: 202 [2021-08-06 15:24:59,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:24:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-06 15:24:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-08-06 15:24:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-08-06 15:24:59,738 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-08-06 15:24:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:59,739 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-08-06 15:24:59,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-08-06 15:24:59,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:24:59,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:59,741 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:24:59,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:24:59,741 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:59,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:59,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1033477442, now seen corresponding path program 1 times [2021-08-06 15:24:59,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:59,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177627193] [2021-08-06 15:24:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:59,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:24:59,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:59,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177627193] [2021-08-06 15:24:59,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177627193] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:24:59,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:24:59,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:24:59,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591279181] [2021-08-06 15:24:59,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:24:59,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:59,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:24:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:24:59,813 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:59,866 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-08-06 15:24:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:24:59,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 15:24:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:59,870 INFO L225 Difference]: With dead ends: 158 [2021-08-06 15:24:59,870 INFO L226 Difference]: Without dead ends: 158 [2021-08-06 15:24:59,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:24:59,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-06 15:24:59,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-08-06 15:24:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-08-06 15:24:59,889 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-08-06 15:24:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:59,889 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-08-06 15:24:59,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-08-06 15:24:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:24:59,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:59,891 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:24:59,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 15:24:59,892 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:59,892 INFO L82 PathProgramCache]: Analyzing trace with hash -324870244, now seen corresponding path program 1 times [2021-08-06 15:24:59,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:59,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157213662] [2021-08-06 15:24:59,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:59,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:24:59,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:59,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157213662] [2021-08-06 15:24:59,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157213662] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:24:59,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:24:59,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:24:59,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136109686] [2021-08-06 15:24:59,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:24:59,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:59,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:24:59,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:24:59,980 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:00,021 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-08-06 15:25:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:25:00,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 15:25:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:00,025 INFO L225 Difference]: With dead ends: 183 [2021-08-06 15:25:00,025 INFO L226 Difference]: Without dead ends: 183 [2021-08-06 15:25:00,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:25:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-08-06 15:25:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-08-06 15:25:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-08-06 15:25:00,051 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-08-06 15:25:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:00,051 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-08-06 15:25:00,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:00,052 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-08-06 15:25:00,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:25:00,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:00,053 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:00,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 15:25:00,054 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:00,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:00,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1959936804, now seen corresponding path program 1 times [2021-08-06 15:25:00,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:00,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656515935] [2021-08-06 15:25:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:00,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:00,641 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 15:25:00,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:00,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656515935] [2021-08-06 15:25:00,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656515935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:00,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89539048] [2021-08-06 15:25:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:00,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:00,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:00,649 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 15:25:00,691 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 15:25:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:00,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:25:00,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:01,592 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 45 treesize of output 33 [2021-08-06 15:25:01,795 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 15:25:01,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89539048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:01,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:01,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:25:01,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380501889] [2021-08-06 15:25:01,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:25:01,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:25:01,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:25:01,801 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 15:25:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:02,083 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-08-06 15:25:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:25:02,084 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:25:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:02,087 INFO L225 Difference]: With dead ends: 330 [2021-08-06 15:25:02,087 INFO L226 Difference]: Without dead ends: 315 [2021-08-06 15:25:02,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:25:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-06 15:25:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-08-06 15:25:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-08-06 15:25:02,101 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-08-06 15:25:02,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:02,102 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-08-06 15:25:02,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 15:25:02,102 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-08-06 15:25:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:25:02,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:02,104 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:02,128 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 15:25:02,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:02,321 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2127745896, now seen corresponding path program 2 times [2021-08-06 15:25:02,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:02,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366971119] [2021-08-06 15:25:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:02,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:02,653 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 15:25:02,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:02,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366971119] [2021-08-06 15:25:02,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366971119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:02,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553359566] [2021-08-06 15:25:02,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:25:02,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:02,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:02,657 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 15:25:02,659 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 15:25:02,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:25:02,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:02,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:25:02,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:03,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:25:03,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2021-08-06 15:25:03,920 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 15:25:03,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553359566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:03,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:03,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-06 15:25:03,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589767463] [2021-08-06 15:25:03,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:25:03,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:03,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:25:03,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:25:03,923 INFO L87 Difference]: Start difference. First operand 224 states and 640 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 15:25:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:04,454 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-08-06 15:25:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:25:04,454 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 22 [2021-08-06 15:25:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:04,457 INFO L225 Difference]: With dead ends: 374 [2021-08-06 15:25:04,457 INFO L226 Difference]: Without dead ends: 359 [2021-08-06 15:25:04,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:25:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-06 15:25:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-08-06 15:25:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-08-06 15:25:04,468 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-08-06 15:25:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:04,469 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-08-06 15:25:04,469 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 15:25:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-08-06 15:25:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:25:04,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:04,470 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:04,500 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 15:25:04,688 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 15:25:04,688 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:04,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1828972448, now seen corresponding path program 3 times [2021-08-06 15:25:04,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:04,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850020146] [2021-08-06 15:25:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:04,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:04,993 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 15:25:04,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:04,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850020146] [2021-08-06 15:25:04,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850020146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:04,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140744635] [2021-08-06 15:25:04,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:25:04,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:04,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:05,001 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 15:25:05,013 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 15:25:05,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:25:05,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:25:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:05,537 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 43 treesize of output 31 [2021-08-06 15:25:05,762 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 15:25:05,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140744635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:05,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:05,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:25:05,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685450500] [2021-08-06 15:25:05,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:25:05,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:05,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:25:05,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:25:05,764 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:05,933 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-08-06 15:25:05,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:25:05,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:25:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:05,935 INFO L225 Difference]: With dead ends: 296 [2021-08-06 15:25:05,936 INFO L226 Difference]: Without dead ends: 281 [2021-08-06 15:25:05,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:25:05,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-06 15:25:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-08-06 15:25:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-08-06 15:25:05,943 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-08-06 15:25:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:05,944 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-08-06 15:25:05,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-08-06 15:25:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:25:05,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:05,945 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:05,968 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 15:25:06,168 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 15:25:06,168 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:06,169 INFO L82 PathProgramCache]: Analyzing trace with hash -258146848, now seen corresponding path program 4 times [2021-08-06 15:25:06,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:06,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968292593] [2021-08-06 15:25:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:06,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:06,438 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 15:25:06,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:06,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968292593] [2021-08-06 15:25:06,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968292593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:06,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118515684] [2021-08-06 15:25:06,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:25:06,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:06,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:06,440 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 15:25:06,440 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 15:25:06,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:25:06,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:06,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:25:06,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:07,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:25:07,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2021-08-06 15:25:07,504 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 15:25:07,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118515684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:07,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:07,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:25:07,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466819392] [2021-08-06 15:25:07,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:07,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:07,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:07,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:07,506 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:25:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:07,895 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-08-06 15:25:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:25:07,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:25:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:07,898 INFO L225 Difference]: With dead ends: 425 [2021-08-06 15:25:07,898 INFO L226 Difference]: Without dead ends: 410 [2021-08-06 15:25:07,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:25:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-06 15:25:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-08-06 15:25:07,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-08-06 15:25:07,907 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-08-06 15:25:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:07,909 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-08-06 15:25:07,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:25:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-08-06 15:25:07,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:07,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:07,911 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:07,936 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 15:25:08,135 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 15:25:08,136 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:08,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:08,136 INFO L82 PathProgramCache]: Analyzing trace with hash 976010682, now seen corresponding path program 5 times [2021-08-06 15:25:08,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:08,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562300812] [2021-08-06 15:25:08,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:08,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:08,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:08,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562300812] [2021-08-06 15:25:08,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562300812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:08,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895832256] [2021-08-06 15:25:08,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:25:08,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:08,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:08,201 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 15:25:08,202 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 15:25:08,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:25:08,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:08,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:08,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:08,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895832256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:08,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:08,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:25:08,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867279057] [2021-08-06 15:25:08,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:25:08,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:08,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:25:08,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:25:08,673 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 15:25:09,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:09,099 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-08-06 15:25:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:25:09,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 24 [2021-08-06 15:25:09,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:09,103 INFO L225 Difference]: With dead ends: 619 [2021-08-06 15:25:09,104 INFO L226 Difference]: Without dead ends: 619 [2021-08-06 15:25:09,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:25:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-06 15:25:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-08-06 15:25:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-08-06 15:25:09,116 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-08-06 15:25:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:09,117 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-08-06 15:25:09,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 15:25:09,117 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-08-06 15:25:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:09,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:09,120 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:09,151 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 15:25:09,332 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 15:25:09,333 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:09,333 INFO L82 PathProgramCache]: Analyzing trace with hash -308162, now seen corresponding path program 6 times [2021-08-06 15:25:09,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:09,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358209918] [2021-08-06 15:25:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:09,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:09,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:09,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358209918] [2021-08-06 15:25:09,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358209918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:09,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471643971] [2021-08-06 15:25:09,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:25:09,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:09,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:09,405 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 15:25:09,412 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 15:25:09,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:25:09,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:09,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:09,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:09,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471643971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:09,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:09,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:25:09,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125286600] [2021-08-06 15:25:09,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:09,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:09,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:09,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:09,931 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:10,805 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-08-06 15:25:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:25:10,809 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:10,815 INFO L225 Difference]: With dead ends: 1078 [2021-08-06 15:25:10,815 INFO L226 Difference]: Without dead ends: 1078 [2021-08-06 15:25:10,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 512.3ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:25:10,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-06 15:25:10,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-08-06 15:25:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-08-06 15:25:10,831 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-08-06 15:25:10,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:10,831 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-08-06 15:25:10,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-08-06 15:25:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:10,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:10,835 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:10,863 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 15:25:11,048 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 15:25:11,049 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:11,049 INFO L82 PathProgramCache]: Analyzing trace with hash 566643918, now seen corresponding path program 7 times [2021-08-06 15:25:11,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:11,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570253692] [2021-08-06 15:25:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:11,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:11,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:11,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570253692] [2021-08-06 15:25:11,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570253692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:11,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295439666] [2021-08-06 15:25:11,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:25:11,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:11,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:11,130 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 15:25:11,157 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 15:25:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:11,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:11,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:11,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295439666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:11,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:11,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:25:11,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301431191] [2021-08-06 15:25:11,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:11,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:11,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:11,632 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:12,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:12,407 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-08-06 15:25:12,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:25:12,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:12,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:12,413 INFO L225 Difference]: With dead ends: 951 [2021-08-06 15:25:12,413 INFO L226 Difference]: Without dead ends: 951 [2021-08-06 15:25:12,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:25:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-06 15:25:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-08-06 15:25:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-08-06 15:25:12,428 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-08-06 15:25:12,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:12,428 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-08-06 15:25:12,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:12,428 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-08-06 15:25:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:12,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:12,429 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:12,452 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 15:25:12,647 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 15:25:12,647 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:12,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1502782590, now seen corresponding path program 1 times [2021-08-06 15:25:12,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:12,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461775333] [2021-08-06 15:25:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:12,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:25:12,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:12,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461775333] [2021-08-06 15:25:12,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461775333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:12,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182694671] [2021-08-06 15:25:12,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:12,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:12,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:12,711 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 15:25:12,712 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 15:25:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:13,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:25:13,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:25:13,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182694671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:13,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:13,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 15:25:13,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516738091] [2021-08-06 15:25:13,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:25:13,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:13,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:25:13,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:25:13,209 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 15:25:13,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:13,345 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-08-06 15:25:13,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:25:13,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-08-06 15:25:13,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:13,349 INFO L225 Difference]: With dead ends: 669 [2021-08-06 15:25:13,349 INFO L226 Difference]: Without dead ends: 663 [2021-08-06 15:25:13,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:13,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-06 15:25:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-08-06 15:25:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-08-06 15:25:13,363 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-08-06 15:25:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:13,363 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-08-06 15:25:13,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 15:25:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-08-06 15:25:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:13,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:13,366 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:13,390 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 15:25:13,589 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 15:25:13,589 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1065813882, now seen corresponding path program 8 times [2021-08-06 15:25:13,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:13,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161529197] [2021-08-06 15:25:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:13,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:13,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:13,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161529197] [2021-08-06 15:25:13,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161529197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:13,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333414469] [2021-08-06 15:25:13,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:25:13,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:13,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:13,665 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 15:25:13,666 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 15:25:13,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:25:13,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:13,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:13,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:14,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333414469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:14,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:14,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:25:14,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735830886] [2021-08-06 15:25:14,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:14,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:14,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:14,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:14,197 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:25:14,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:14,398 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-08-06 15:25:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:25:14,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:25:14,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:14,401 INFO L225 Difference]: With dead ends: 710 [2021-08-06 15:25:14,401 INFO L226 Difference]: Without dead ends: 672 [2021-08-06 15:25:14,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:25:14,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-08-06 15:25:14,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-08-06 15:25:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-08-06 15:25:14,416 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-08-06 15:25:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:14,416 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-08-06 15:25:14,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:25:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-08-06 15:25:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:14,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:14,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:14,455 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 15:25:14,649 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 15:25:14,649 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:14,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:14,649 INFO L82 PathProgramCache]: Analyzing trace with hash 359856550, now seen corresponding path program 2 times [2021-08-06 15:25:14,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:14,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735469096] [2021-08-06 15:25:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:14,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:25:14,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:14,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735469096] [2021-08-06 15:25:14,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735469096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:14,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532150268] [2021-08-06 15:25:14,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:25:14,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:14,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:14,704 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 15:25:14,722 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 15:25:15,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:25:15,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:15,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:25:15,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:25:15,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532150268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:15,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:15,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 15:25:15,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920885533] [2021-08-06 15:25:15,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:25:15,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:15,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:25:15,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:25:15,216 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 15:25:15,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:15,320 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-08-06 15:25:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:25:15,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-08-06 15:25:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:15,331 INFO L225 Difference]: With dead ends: 830 [2021-08-06 15:25:15,331 INFO L226 Difference]: Without dead ends: 830 [2021-08-06 15:25:15,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-06 15:25:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-08-06 15:25:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-08-06 15:25:15,349 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-08-06 15:25:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:15,349 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-08-06 15:25:15,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 15:25:15,349 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-08-06 15:25:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:15,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:15,351 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:15,377 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 15:25:15,571 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 15:25:15,571 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:15,572 INFO L82 PathProgramCache]: Analyzing trace with hash -986825016, now seen corresponding path program 9 times [2021-08-06 15:25:15,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:15,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198739296] [2021-08-06 15:25:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:15,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:15,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:15,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198739296] [2021-08-06 15:25:15,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198739296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:15,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485376860] [2021-08-06 15:25:15,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:25:15,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:15,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:15,632 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 15:25:15,637 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 15:25:15,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:25:15,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:15,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:15,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:16,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485376860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:16,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:16,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:25:16,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071710269] [2021-08-06 15:25:16,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:25:16,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:16,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:25:16,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:25:16,115 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 15:25:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:16,413 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-08-06 15:25:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:25:16,413 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-08-06 15:25:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:16,418 INFO L225 Difference]: With dead ends: 1196 [2021-08-06 15:25:16,418 INFO L226 Difference]: Without dead ends: 1196 [2021-08-06 15:25:16,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:25:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-06 15:25:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-08-06 15:25:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-08-06 15:25:16,438 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-08-06 15:25:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:16,438 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-08-06 15:25:16,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 15:25:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-08-06 15:25:16,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:16,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:16,440 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:16,464 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 15:25:16,656 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 15:25:16,657 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:16,657 INFO L82 PathProgramCache]: Analyzing trace with hash -201910922, now seen corresponding path program 10 times [2021-08-06 15:25:16,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:16,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613113558] [2021-08-06 15:25:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:16,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:16,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:16,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613113558] [2021-08-06 15:25:16,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613113558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:16,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419641775] [2021-08-06 15:25:16,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:25:16,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:16,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:16,727 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 15:25:16,727 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 15:25:17,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:25:17,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:17,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:17,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:17,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419641775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:17,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:17,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:25:17,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295888215] [2021-08-06 15:25:17,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:25:17,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:17,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:25:17,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:25:17,223 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 15:25:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:17,667 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-08-06 15:25:17,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:25:17,668 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-08-06 15:25:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:17,674 INFO L225 Difference]: With dead ends: 1492 [2021-08-06 15:25:17,674 INFO L226 Difference]: Without dead ends: 1492 [2021-08-06 15:25:17,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:25:17,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-06 15:25:17,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-08-06 15:25:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-08-06 15:25:17,697 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-08-06 15:25:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:17,697 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-08-06 15:25:17,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 15:25:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-08-06 15:25:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:17,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:17,699 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:17,728 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 15:25:17,918 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 15:25:17,919 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:17,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1284933578, now seen corresponding path program 11 times [2021-08-06 15:25:17,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:17,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645574542] [2021-08-06 15:25:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:17,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:17,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:17,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645574542] [2021-08-06 15:25:17,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645574542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:17,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681472575] [2021-08-06 15:25:17,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:25:17,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:17,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:17,972 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 15:25:17,982 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 15:25:18,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:25:18,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:18,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:18,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:18,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681472575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:18,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:18,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:25:18,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492575656] [2021-08-06 15:25:18,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:18,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:18,517 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:25:18,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:18,769 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-08-06 15:25:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:25:18,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:25:18,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:18,773 INFO L225 Difference]: With dead ends: 1258 [2021-08-06 15:25:18,773 INFO L226 Difference]: Without dead ends: 1248 [2021-08-06 15:25:18,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:25:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-08-06 15:25:18,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-08-06 15:25:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-08-06 15:25:18,794 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-08-06 15:25:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:18,794 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-08-06 15:25:18,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:25:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-08-06 15:25:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:18,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:18,796 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:18,829 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 15:25:19,028 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 15:25:19,029 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash 186144540, now seen corresponding path program 12 times [2021-08-06 15:25:19,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:19,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438373004] [2021-08-06 15:25:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:19,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:19,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:19,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438373004] [2021-08-06 15:25:19,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438373004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:19,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555168942] [2021-08-06 15:25:19,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:25:19,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:19,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:19,101 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 15:25:19,102 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 15:25:19,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:25:19,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:19,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:19,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:19,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555168942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:19,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:19,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:25:19,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970133285] [2021-08-06 15:25:19,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:19,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:19,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:19,632 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 15:25:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:19,907 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-08-06 15:25:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:25:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-08-06 15:25:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:19,912 INFO L225 Difference]: With dead ends: 1329 [2021-08-06 15:25:19,912 INFO L226 Difference]: Without dead ends: 1329 [2021-08-06 15:25:19,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:25:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-08-06 15:25:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-08-06 15:25:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-08-06 15:25:19,932 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-08-06 15:25:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:19,933 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-08-06 15:25:19,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 15:25:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-08-06 15:25:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:19,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:19,935 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:19,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-06 15:25:20,158 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 15:25:20,158 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:20,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:20,159 INFO L82 PathProgramCache]: Analyzing trace with hash -246732064, now seen corresponding path program 13 times [2021-08-06 15:25:20,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:20,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145472566] [2021-08-06 15:25:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:20,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:20,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:20,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145472566] [2021-08-06 15:25:20,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145472566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:20,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000695211] [2021-08-06 15:25:20,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:25:20,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:20,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:20,215 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 15:25:20,229 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 15:25:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:20,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:20,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:20,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000695211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:20,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:20,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:25:20,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209332164] [2021-08-06 15:25:20,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:25:20,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:20,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:25:20,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:25:20,755 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 15:25:21,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:21,104 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-08-06 15:25:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:25:21,105 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-08-06 15:25:21,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:21,110 INFO L225 Difference]: With dead ends: 1548 [2021-08-06 15:25:21,110 INFO L226 Difference]: Without dead ends: 1544 [2021-08-06 15:25:21,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:25:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-06 15:25:21,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-08-06 15:25:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-08-06 15:25:21,134 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-08-06 15:25:21,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:21,134 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-08-06 15:25:21,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 15:25:21,135 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-08-06 15:25:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:21,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:21,137 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:21,167 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 15:25:21,356 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 15:25:21,357 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash -518741254, now seen corresponding path program 14 times [2021-08-06 15:25:21,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:21,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077888183] [2021-08-06 15:25:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:21,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:21,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:21,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077888183] [2021-08-06 15:25:21,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077888183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:21,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121728611] [2021-08-06 15:25:21,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:25:21,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:21,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:21,422 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 15:25:21,423 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 15:25:21,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:25:21,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:21,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:22,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121728611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:22,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:22,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:25:22,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070450322] [2021-08-06 15:25:22,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:22,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:22,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:22,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:22,004 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:22,798 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-08-06 15:25:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:25:22,798 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:22,810 INFO L225 Difference]: With dead ends: 2734 [2021-08-06 15:25:22,810 INFO L226 Difference]: Without dead ends: 2734 [2021-08-06 15:25:22,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 459.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:25:22,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-08-06 15:25:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-08-06 15:25:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-08-06 15:25:22,845 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-08-06 15:25:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:22,845 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-08-06 15:25:22,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:22,845 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-08-06 15:25:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:22,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:22,847 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:22,875 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 15:25:23,075 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 15:25:23,075 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:23,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:23,075 INFO L82 PathProgramCache]: Analyzing trace with hash 48210826, now seen corresponding path program 15 times [2021-08-06 15:25:23,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:23,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279969850] [2021-08-06 15:25:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:23,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:23,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:23,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279969850] [2021-08-06 15:25:23,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279969850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:23,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843802290] [2021-08-06 15:25:23,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:25:23,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:23,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:23,129 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 15:25:23,130 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 15:25:23,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:25:23,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:23,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:23,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843802290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:23,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:23,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:25:23,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317784274] [2021-08-06 15:25:23,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:23,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:23,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:23,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:23,727 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:24,433 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-08-06 15:25:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:25:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:24,443 INFO L225 Difference]: With dead ends: 2693 [2021-08-06 15:25:24,443 INFO L226 Difference]: Without dead ends: 2693 [2021-08-06 15:25:24,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:25:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-08-06 15:25:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-08-06 15:25:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-08-06 15:25:24,479 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-08-06 15:25:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:24,479 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-08-06 15:25:24,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-08-06 15:25:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:24,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:24,482 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:24,507 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 15:25:24,696 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 15:25:24,697 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:24,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:24,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1124135032, now seen corresponding path program 16 times [2021-08-06 15:25:24,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:24,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758385708] [2021-08-06 15:25:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:24,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:24,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:24,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758385708] [2021-08-06 15:25:24,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758385708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:24,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112791198] [2021-08-06 15:25:24,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:25:24,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:24,756 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 15:25:24,756 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 15:25:25,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:25:25,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:25,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:25,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:25,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112791198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:25,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:25,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:25:25,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944770961] [2021-08-06 15:25:25,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:25:25,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:25,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:25:25,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:25:25,313 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:25:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:26,059 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-08-06 15:25:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:25:26,059 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:26,066 INFO L225 Difference]: With dead ends: 2677 [2021-08-06 15:25:26,066 INFO L226 Difference]: Without dead ends: 2677 [2021-08-06 15:25:26,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:25:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-08-06 15:25:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-08-06 15:25:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-08-06 15:25:26,097 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-08-06 15:25:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:26,098 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-08-06 15:25:26,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:25:26,098 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-08-06 15:25:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:26,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:26,100 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:26,124 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 15:25:26,324 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 15:25:26,324 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:26,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:26,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1042758944, now seen corresponding path program 17 times [2021-08-06 15:25:26,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:26,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296245447] [2021-08-06 15:25:26,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:26,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:26,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:26,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296245447] [2021-08-06 15:25:26,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296245447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:26,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567142173] [2021-08-06 15:25:26,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:25:26,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:26,376 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 15:25:26,377 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 15:25:26,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:25:26,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:26,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:26,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:26,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567142173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:26,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:26,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:25:26,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052738821] [2021-08-06 15:25:26,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:25:26,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:26,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:25:26,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:25:26,945 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:25:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:27,531 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-08-06 15:25:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:25:27,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:27,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:27,537 INFO L225 Difference]: With dead ends: 2474 [2021-08-06 15:25:27,537 INFO L226 Difference]: Without dead ends: 2470 [2021-08-06 15:25:27,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 322.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:25:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-08-06 15:25:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-08-06 15:25:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-08-06 15:25:27,570 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-08-06 15:25:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:27,570 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-08-06 15:25:27,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:25:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-08-06 15:25:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:27,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:27,573 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:27,597 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 15:25:27,792 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 15:25:27,793 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:27,793 INFO L82 PathProgramCache]: Analyzing trace with hash -112101728, now seen corresponding path program 18 times [2021-08-06 15:25:27,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:27,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830583788] [2021-08-06 15:25:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:27,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:27,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:27,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830583788] [2021-08-06 15:25:27,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830583788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:27,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804603093] [2021-08-06 15:25:27,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:25:27,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:27,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:27,846 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 15:25:27,849 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 15:25:28,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:25:28,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:28,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:28,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:28,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804603093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:28,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:28,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:25:28,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268209853] [2021-08-06 15:25:28,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:28,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:28,444 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:29,160 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-08-06 15:25:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:25:29,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:29,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:29,168 INFO L225 Difference]: With dead ends: 2514 [2021-08-06 15:25:29,169 INFO L226 Difference]: Without dead ends: 2514 [2021-08-06 15:25:29,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:25:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-08-06 15:25:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-08-06 15:25:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-08-06 15:25:29,199 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-08-06 15:25:29,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:29,199 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-08-06 15:25:29,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-08-06 15:25:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:29,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:29,206 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:29,234 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 15:25:29,420 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 15:25:29,421 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:29,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1530937426, now seen corresponding path program 19 times [2021-08-06 15:25:29,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:29,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862214810] [2021-08-06 15:25:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:29,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:29,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:29,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862214810] [2021-08-06 15:25:29,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862214810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:29,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968012434] [2021-08-06 15:25:29,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:25:29,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:29,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:29,484 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 15:25:29,512 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 15:25:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:29,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:30,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968012434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:30,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:30,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:25:30,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560286941] [2021-08-06 15:25:30,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:30,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:30,162 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:30,798 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-08-06 15:25:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:25:30,798 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:30,805 INFO L225 Difference]: With dead ends: 2332 [2021-08-06 15:25:30,805 INFO L226 Difference]: Without dead ends: 2328 [2021-08-06 15:25:30,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:25:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-06 15:25:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-08-06 15:25:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:30,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-08-06 15:25:30,837 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-08-06 15:25:30,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:30,837 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-08-06 15:25:30,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-08-06 15:25:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:30,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:30,840 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:30,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-06 15:25:31,064 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 15:25:31,065 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:31,065 INFO L82 PathProgramCache]: Analyzing trace with hash 618651874, now seen corresponding path program 3 times [2021-08-06 15:25:31,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:31,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560127939] [2021-08-06 15:25:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:31,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:25:31,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:31,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560127939] [2021-08-06 15:25:31,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560127939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:31,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56015240] [2021-08-06 15:25:31,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:25:31,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:31,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:31,107 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 15:25:31,109 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 15:25:31,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:25:31,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:31,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:25:31,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:25:31,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56015240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:31,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:31,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 15:25:31,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399747496] [2021-08-06 15:25:31,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:25:31,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:31,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:25:31,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:25:31,685 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 15:25:31,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:31,768 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-08-06 15:25:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:25:31,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-08-06 15:25:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:31,771 INFO L225 Difference]: With dead ends: 929 [2021-08-06 15:25:31,771 INFO L226 Difference]: Without dead ends: 929 [2021-08-06 15:25:31,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:25:31,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-06 15:25:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-08-06 15:25:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-08-06 15:25:31,788 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-08-06 15:25:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:31,788 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-08-06 15:25:31,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 15:25:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-08-06 15:25:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:31,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:31,790 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:31,814 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 15:25:32,004 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 15:25:32,005 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:32,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:32,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1548851618, now seen corresponding path program 20 times [2021-08-06 15:25:32,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:32,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873141528] [2021-08-06 15:25:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:32,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:32,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:32,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873141528] [2021-08-06 15:25:32,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873141528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:32,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543135428] [2021-08-06 15:25:32,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:25:32,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:32,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:32,067 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 15:25:32,067 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 15:25:32,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:25:32,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:32,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:32,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:32,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543135428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:32,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:32,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 15:25:32,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293839910] [2021-08-06 15:25:32,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:25:32,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:25:32,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:25:32,647 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:32,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:32,927 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-08-06 15:25:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:25:32,928 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:32,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:32,931 INFO L225 Difference]: With dead ends: 1555 [2021-08-06 15:25:32,931 INFO L226 Difference]: Without dead ends: 1555 [2021-08-06 15:25:32,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:25:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-08-06 15:25:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-08-06 15:25:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-08-06 15:25:32,951 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-08-06 15:25:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:32,951 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-08-06 15:25:32,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-08-06 15:25:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:32,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:32,953 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:32,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:33,169 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 15:25:33,169 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:33,169 INFO L82 PathProgramCache]: Analyzing trace with hash -843436226, now seen corresponding path program 21 times [2021-08-06 15:25:33,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:33,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092321661] [2021-08-06 15:25:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:33,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:33,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:33,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092321661] [2021-08-06 15:25:33,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092321661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:33,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274031568] [2021-08-06 15:25:33,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:25:33,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:33,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:33,213 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 15:25:33,214 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 15:25:33,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:25:33,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:33,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274031568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:33,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:33,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 15:25:33,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805075530] [2021-08-06 15:25:33,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:25:33,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:33,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:25:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:25:33,814 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 15:25:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:34,051 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-08-06 15:25:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:25:34,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:34,054 INFO L225 Difference]: With dead ends: 1605 [2021-08-06 15:25:34,054 INFO L226 Difference]: Without dead ends: 1605 [2021-08-06 15:25:34,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:25:34,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-08-06 15:25:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-08-06 15:25:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-08-06 15:25:34,078 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-08-06 15:25:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:34,078 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-08-06 15:25:34,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 15:25:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-08-06 15:25:34,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:34,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:34,080 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:34,102 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 15:25:34,291 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 15:25:34,291 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:34,291 INFO L82 PathProgramCache]: Analyzing trace with hash -888257368, now seen corresponding path program 22 times [2021-08-06 15:25:34,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:34,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307868349] [2021-08-06 15:25:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:34,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:25:34,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:34,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307868349] [2021-08-06 15:25:34,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307868349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:34,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201667986] [2021-08-06 15:25:34,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:25:34,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:34,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:34,342 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 15:25:34,345 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 15:25:34,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:25:34,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:34,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:34,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:25:34,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201667986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:34,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:34,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 15:25:34,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983856604] [2021-08-06 15:25:34,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:25:34,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:34,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:25:34,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:25:34,919 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 15:25:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:35,131 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-08-06 15:25:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:25:35,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:35,134 INFO L225 Difference]: With dead ends: 1524 [2021-08-06 15:25:35,134 INFO L226 Difference]: Without dead ends: 1520 [2021-08-06 15:25:35,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:25:35,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-08-06 15:25:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-08-06 15:25:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-08-06 15:25:35,149 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-08-06 15:25:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:35,149 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-08-06 15:25:35,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 15:25:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-08-06 15:25:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:35,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:35,150 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:35,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 15:25:35,351 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 15:25:35,351 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:35,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:35,351 INFO L82 PathProgramCache]: Analyzing trace with hash -290920710, now seen corresponding path program 23 times [2021-08-06 15:25:35,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:35,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465064167] [2021-08-06 15:25:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:35,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:35,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:35,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465064167] [2021-08-06 15:25:35,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465064167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:35,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032853523] [2021-08-06 15:25:35,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:25:35,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:35,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:35,414 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 15:25:35,415 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 15:25:35,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:25:35,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:35,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:35,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:36,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032853523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:36,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:36,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 15:25:36,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923737005] [2021-08-06 15:25:36,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:25:36,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:36,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:25:36,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:25:36,001 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:36,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:36,236 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-08-06 15:25:36,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:25:36,236 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:36,239 INFO L225 Difference]: With dead ends: 1508 [2021-08-06 15:25:36,239 INFO L226 Difference]: Without dead ends: 1496 [2021-08-06 15:25:36,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:25:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-08-06 15:25:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-08-06 15:25:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-08-06 15:25:36,255 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-08-06 15:25:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:36,255 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-08-06 15:25:36,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-08-06 15:25:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:36,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:36,257 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:36,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-06 15:25:36,458 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 15:25:36,458 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:36,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:36,458 INFO L82 PathProgramCache]: Analyzing trace with hash -817340994, now seen corresponding path program 24 times [2021-08-06 15:25:36,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:36,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467518268] [2021-08-06 15:25:36,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:36,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:36,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:36,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467518268] [2021-08-06 15:25:36,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467518268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:36,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391707353] [2021-08-06 15:25:36,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:25:36,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:36,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:36,521 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 15:25:36,522 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 15:25:36,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:25:36,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:36,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:36,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:37,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391707353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:37,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:37,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:25:37,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485590730] [2021-08-06 15:25:37,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:37,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:37,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:37,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:37,253 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:37,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:37,810 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-08-06 15:25:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:25:37,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:37,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:37,816 INFO L225 Difference]: With dead ends: 2412 [2021-08-06 15:25:37,816 INFO L226 Difference]: Without dead ends: 2412 [2021-08-06 15:25:37,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:25:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-06 15:25:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-08-06 15:25:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-08-06 15:25:37,840 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-08-06 15:25:37,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:37,840 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-08-06 15:25:37,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:37,840 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-08-06 15:25:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:37,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:37,841 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:37,859 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 15:25:38,042 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 15:25:38,042 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:38,042 INFO L82 PathProgramCache]: Analyzing trace with hash -250388914, now seen corresponding path program 25 times [2021-08-06 15:25:38,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:38,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86675069] [2021-08-06 15:25:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:38,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:38,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:38,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86675069] [2021-08-06 15:25:38,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86675069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:38,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983417812] [2021-08-06 15:25:38,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:25:38,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:38,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:38,099 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 15:25:38,100 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 15:25:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:38,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:38,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:38,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983417812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:38,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:38,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:25:38,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011641719] [2021-08-06 15:25:38,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:38,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:38,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:38,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:38,788 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:39,249 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-08-06 15:25:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:25:39,250 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:39,254 INFO L225 Difference]: With dead ends: 2335 [2021-08-06 15:25:39,254 INFO L226 Difference]: Without dead ends: 2335 [2021-08-06 15:25:39,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:25:39,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-06 15:25:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-08-06 15:25:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-06 15:25:39,274 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-06 15:25:39,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:39,274 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-06 15:25:39,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:25:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-06 15:25:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:39,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:39,276 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:39,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:39,490 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 15:25:39,490 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:39,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1422734772, now seen corresponding path program 26 times [2021-08-06 15:25:39,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:39,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794068925] [2021-08-06 15:25:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:39,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:39,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:39,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794068925] [2021-08-06 15:25:39,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794068925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:39,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328509925] [2021-08-06 15:25:39,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:25:39,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:39,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:39,551 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 15:25:39,551 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 15:25:40,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:25:40,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:40,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:40,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:40,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328509925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:40,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:40,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:25:40,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377003551] [2021-08-06 15:25:40,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:25:40,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:40,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:25:40,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:25:40,254 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:25:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:40,661 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-08-06 15:25:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:25:40,663 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:40,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:40,676 INFO L225 Difference]: With dead ends: 2285 [2021-08-06 15:25:40,676 INFO L226 Difference]: Without dead ends: 2285 [2021-08-06 15:25:40,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:25:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-06 15:25:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-08-06 15:25:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-06 15:25:40,696 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-06 15:25:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:40,696 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-06 15:25:40,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:25:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-06 15:25:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:40,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:40,698 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:40,715 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 15:25:40,898 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 15:25:40,898 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:40,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1341358684, now seen corresponding path program 27 times [2021-08-06 15:25:40,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:40,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550347264] [2021-08-06 15:25:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:40,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:40,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:40,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550347264] [2021-08-06 15:25:40,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550347264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:40,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063044586] [2021-08-06 15:25:40,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:25:40,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:40,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:40,950 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 15:25:40,951 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 15:25:41,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:25:41,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:41,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:41,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063044586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:41,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:41,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:25:41,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146189482] [2021-08-06 15:25:41,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:25:41,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:41,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:25:41,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:25:41,628 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:25:41,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:41,985 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-08-06 15:25:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:25:41,986 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:41,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:41,989 INFO L225 Difference]: With dead ends: 2176 [2021-08-06 15:25:41,989 INFO L226 Difference]: Without dead ends: 2172 [2021-08-06 15:25:41,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:25:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-08-06 15:25:42,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-08-06 15:25:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-06 15:25:42,010 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-06 15:25:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:42,010 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-06 15:25:42,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:25:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-06 15:25:42,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:42,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:42,012 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:42,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 15:25:42,213 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 15:25:42,213 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:42,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:42,213 INFO L82 PathProgramCache]: Analyzing trace with hash -410701468, now seen corresponding path program 28 times [2021-08-06 15:25:42,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:42,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112095726] [2021-08-06 15:25:42,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:42,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:42,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:42,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112095726] [2021-08-06 15:25:42,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112095726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:42,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802032662] [2021-08-06 15:25:42,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:25:42,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:42,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:42,272 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 15:25:42,277 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 15:25:42,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:25:42,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:42,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:42,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:43,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802032662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:43,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:43,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:25:43,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536725402] [2021-08-06 15:25:43,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:43,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:43,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:43,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:43,028 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:43,408 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-08-06 15:25:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:25:43,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:43,412 INFO L225 Difference]: With dead ends: 2199 [2021-08-06 15:25:43,412 INFO L226 Difference]: Without dead ends: 2199 [2021-08-06 15:25:43,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:25:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-08-06 15:25:43,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-08-06 15:25:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-06 15:25:43,432 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-06 15:25:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:43,432 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-06 15:25:43,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-06 15:25:43,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:43,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:43,434 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:43,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 15:25:43,636 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 15:25:43,636 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1232337686, now seen corresponding path program 29 times [2021-08-06 15:25:43,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:43,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858951588] [2021-08-06 15:25:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:43,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:43,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:43,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858951588] [2021-08-06 15:25:43,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858951588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:43,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143421941] [2021-08-06 15:25:43,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:25:43,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:43,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:43,705 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 15:25:43,706 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 15:25:44,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:25:44,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:44,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:44,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:44,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143421941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:44,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:44,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:25:44,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168251623] [2021-08-06 15:25:44,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:44,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:44,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:44,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:44,426 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:44,827 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-08-06 15:25:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:25:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:44,830 INFO L225 Difference]: With dead ends: 2156 [2021-08-06 15:25:44,830 INFO L226 Difference]: Without dead ends: 2152 [2021-08-06 15:25:44,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:25:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-08-06 15:25:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-08-06 15:25:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-06 15:25:44,856 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-06 15:25:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:44,856 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-06 15:25:44,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-06 15:25:44,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:44,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:44,859 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:44,889 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 15:25:45,081 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 15:25:45,081 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:45,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2059201626, now seen corresponding path program 30 times [2021-08-06 15:25:45,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:45,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203761991] [2021-08-06 15:25:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:45,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:45,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:45,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203761991] [2021-08-06 15:25:45,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203761991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:45,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157153807] [2021-08-06 15:25:45,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:25:45,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:45,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:45,154 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 15:25:45,156 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 15:25:45,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:25:45,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:45,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:45,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:45,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157153807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:45,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:45,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:25:45,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890166663] [2021-08-06 15:25:45,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:25:45,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:45,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:25:45,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:25:45,876 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) 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 15:25:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:46,218 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-08-06 15:25:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:25:46,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) 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 24 [2021-08-06 15:25:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:46,222 INFO L225 Difference]: With dead ends: 2097 [2021-08-06 15:25:46,222 INFO L226 Difference]: Without dead ends: 2097 [2021-08-06 15:25:46,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:25:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-08-06 15:25:46,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-08-06 15:25:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:46,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-08-06 15:25:46,240 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-08-06 15:25:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:46,241 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-08-06 15:25:46,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) 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 15:25:46,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-08-06 15:25:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:46,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:46,243 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:46,263 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 15:25:46,452 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 15:25:46,452 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:46,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:46,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1977825538, now seen corresponding path program 31 times [2021-08-06 15:25:46,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:46,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573220679] [2021-08-06 15:25:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:46,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:46,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:46,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573220679] [2021-08-06 15:25:46,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573220679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:46,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133725584] [2021-08-06 15:25:46,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:25:46,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:46,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:46,508 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 15:25:46,510 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 15:25:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:47,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:47,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:47,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133725584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:47,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:47,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:25:47,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559551397] [2021-08-06 15:25:47,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:25:47,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:47,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:25:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:25:47,223 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) 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 15:25:47,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:47,488 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-08-06 15:25:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:25:47,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) 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 24 [2021-08-06 15:25:47,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:47,491 INFO L225 Difference]: With dead ends: 1963 [2021-08-06 15:25:47,491 INFO L226 Difference]: Without dead ends: 1959 [2021-08-06 15:25:47,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:25:47,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-08-06 15:25:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-08-06 15:25:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-08-06 15:25:47,514 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-08-06 15:25:47,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:47,514 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-08-06 15:25:47,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) 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 15:25:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-08-06 15:25:47,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:47,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:47,517 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:47,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-06 15:25:47,740 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 15:25:47,740 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash 802049786, now seen corresponding path program 32 times [2021-08-06 15:25:47,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:47,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640047006] [2021-08-06 15:25:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:47,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:47,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:47,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640047006] [2021-08-06 15:25:47,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640047006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:47,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824878498] [2021-08-06 15:25:47,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:25:47,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:47,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:47,803 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 15:25:47,804 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 15:25:48,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:25:48,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:48,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:48,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:48,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824878498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:48,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:48,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:25:48,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768736442] [2021-08-06 15:25:48,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:25:48,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:48,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:25:48,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:25:48,514 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) 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 15:25:48,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:48,733 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-08-06 15:25:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:25:48,734 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) 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 24 [2021-08-06 15:25:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:48,736 INFO L225 Difference]: With dead ends: 1728 [2021-08-06 15:25:48,736 INFO L226 Difference]: Without dead ends: 1716 [2021-08-06 15:25:48,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:25:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-08-06 15:25:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-08-06 15:25:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-08-06 15:25:48,764 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-08-06 15:25:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:48,764 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-08-06 15:25:48,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) 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 15:25:48,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-08-06 15:25:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:48,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:48,767 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:48,785 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 15:25:48,971 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 15:25:48,971 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:48,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1895790794, now seen corresponding path program 33 times [2021-08-06 15:25:48,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:48,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276766950] [2021-08-06 15:25:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:48,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:49,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:49,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276766950] [2021-08-06 15:25:49,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276766950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:49,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239983067] [2021-08-06 15:25:49,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:25:49,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:49,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:49,038 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 15:25:49,038 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 15:25:49,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:25:49,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:49,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:49,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:49,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239983067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:49,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:49,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:25:49,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435790073] [2021-08-06 15:25:49,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:49,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:49,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:49,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:49,837 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:50,173 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-08-06 15:25:50,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:25:50,174 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:50,177 INFO L225 Difference]: With dead ends: 1821 [2021-08-06 15:25:50,177 INFO L226 Difference]: Without dead ends: 1821 [2021-08-06 15:25:50,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:25:50,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-08-06 15:25:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-08-06 15:25:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-08-06 15:25:50,212 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-08-06 15:25:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:50,212 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-08-06 15:25:50,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-08-06 15:25:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:50,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:50,215 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:50,241 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 15:25:50,435 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 15:25:50,436 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash -252751640, now seen corresponding path program 34 times [2021-08-06 15:25:50,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:50,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075943073] [2021-08-06 15:25:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:50,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:50,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:50,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075943073] [2021-08-06 15:25:50,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075943073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:50,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016108223] [2021-08-06 15:25:50,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:25:50,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:50,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:50,499 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 15:25:50,500 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 15:25:51,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:25:51,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:51,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:51,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:51,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016108223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:51,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:51,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:25:51,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033836133] [2021-08-06 15:25:51,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:25:51,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:51,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:25:51,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:25:51,264 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:51,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:51,549 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-08-06 15:25:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:25:51,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:51,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:51,552 INFO L225 Difference]: With dead ends: 1790 [2021-08-06 15:25:51,552 INFO L226 Difference]: Without dead ends: 1786 [2021-08-06 15:25:51,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:25:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-08-06 15:25:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-08-06 15:25:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-08-06 15:25:51,584 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-08-06 15:25:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:51,585 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-08-06 15:25:51,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-08-06 15:25:51,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:25:51,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:51,586 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:51,603 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 15:25:51,787 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 15:25:51,787 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:51,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:51,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1520208818, now seen corresponding path program 35 times [2021-08-06 15:25:51,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:51,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473110585] [2021-08-06 15:25:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:51,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:51,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:51,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473110585] [2021-08-06 15:25:51,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473110585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:51,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850183772] [2021-08-06 15:25:51,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:25:51,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:51,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:51,861 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 15:25:51,886 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 15:25:52,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:25:52,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:25:52,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:52,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850183772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:52,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:52,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:25:52,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146852996] [2021-08-06 15:25:52,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:25:52,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:52,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:25:52,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:25:52,639 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:25:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:52,817 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-08-06 15:25:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:25:52,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:25:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:52,820 INFO L225 Difference]: With dead ends: 1649 [2021-08-06 15:25:52,820 INFO L226 Difference]: Without dead ends: 1637 [2021-08-06 15:25:52,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:25:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-08-06 15:25:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-08-06 15:25:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-08-06 15:25:52,840 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-08-06 15:25:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:52,840 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-08-06 15:25:52,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:25:52,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-08-06 15:25:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:52,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:52,843 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:52,874 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 15:25:53,067 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 15:25:53,067 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:53,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1154803164, now seen corresponding path program 4 times [2021-08-06 15:25:53,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:53,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474674934] [2021-08-06 15:25:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:53,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:54,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:54,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474674934] [2021-08-06 15:25:54,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474674934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:54,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186755770] [2021-08-06 15:25:54,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:25:54,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:54,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:54,402 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:25:54,402 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 15:25:55,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:25:55,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:55,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:25:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:56,388 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:25:56,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:25:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:56,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186755770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:56,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:56,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:25:56,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419028369] [2021-08-06 15:25:56,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:25:56,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:56,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:25:56,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:25:56,786 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:25:57,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:57,697 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-08-06 15:25:57,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:25:57,697 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:25:57,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:57,700 INFO L225 Difference]: With dead ends: 1517 [2021-08-06 15:25:57,700 INFO L226 Difference]: Without dead ends: 1502 [2021-08-06 15:25:57,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 999.5ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:25:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-08-06 15:25:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-08-06 15:25:57,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-08-06 15:25:57,715 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-08-06 15:25:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:57,715 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-08-06 15:25:57,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:25:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-08-06 15:25:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:57,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:57,717 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:25:57,735 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 15:25:57,918 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 15:25:57,918 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:57,918 INFO L82 PathProgramCache]: Analyzing trace with hash -873594852, now seen corresponding path program 5 times [2021-08-06 15:25:57,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:57,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447836002] [2021-08-06 15:25:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:57,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:59,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:59,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447836002] [2021-08-06 15:25:59,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447836002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:59,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264633397] [2021-08-06 15:25:59,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:25:59,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:59,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:59,022 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 15:25:59,024 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 15:25:59,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:25:59,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:59,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:25:59,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:00,888 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:26:00,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:26:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:01,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264633397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:01,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:01,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:26:01,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026477916] [2021-08-06 15:26:01,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:26:01,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:01,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:26:01,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:26:01,448 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:26:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:02,240 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-08-06 15:26:02,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:26:02,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:26:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:02,243 INFO L225 Difference]: With dead ends: 1495 [2021-08-06 15:26:02,243 INFO L226 Difference]: Without dead ends: 1480 [2021-08-06 15:26:02,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 898.2ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:26:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-08-06 15:26:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-08-06 15:26:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-08-06 15:26:02,260 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-08-06 15:26:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:02,260 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-08-06 15:26:02,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:26:02,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-08-06 15:26:02,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:02,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:02,263 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:02,294 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 15:26:02,488 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 15:26:02,488 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:02,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:02,489 INFO L82 PathProgramCache]: Analyzing trace with hash 717834456, now seen corresponding path program 36 times [2021-08-06 15:26:02,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:02,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653582652] [2021-08-06 15:26:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:02,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:03,486 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 15:26:03,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:03,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653582652] [2021-08-06 15:26:03,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653582652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:03,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042972640] [2021-08-06 15:26:03,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:26:03,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:03,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:03,487 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 15:26:03,488 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 15:26:04,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:26:04,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:26:04,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:05,640 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:26:05,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-06 15:26:05,817 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 15:26:05,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042972640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:05,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:05,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:26:05,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174672571] [2021-08-06 15:26:05,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:26:05,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:05,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:26:05,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:26:05,818 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:26:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:08,537 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-08-06 15:26:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:26:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:26:08,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:08,541 INFO L225 Difference]: With dead ends: 1650 [2021-08-06 15:26:08,541 INFO L226 Difference]: Without dead ends: 1635 [2021-08-06 15:26:08,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2646.0ms TimeCoverageRelationStatistics Valid=333, Invalid=1647, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:26:08,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-08-06 15:26:08,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-08-06 15:26:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-08-06 15:26:08,557 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-08-06 15:26:08,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:08,557 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-08-06 15:26:08,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:26:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-08-06 15:26:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:08,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:08,559 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:08,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 15:26:08,760 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 15:26:08,760 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:08,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1522881632, now seen corresponding path program 6 times [2021-08-06 15:26:08,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:08,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628724757] [2021-08-06 15:26:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:08,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:09,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:09,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628724757] [2021-08-06 15:26:09,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628724757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:09,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618797385] [2021-08-06 15:26:09,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:26:09,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:09,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:09,941 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 15:26:09,942 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 15:26:10,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:26:10,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:10,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:26:10,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:11,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:26:11,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:26:11,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 15:26:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:12,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618797385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:12,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:12,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:26:12,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106041327] [2021-08-06 15:26:12,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:26:12,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:12,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:26:12,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:26:12,807 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:16,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:16,198 INFO L93 Difference]: Finished difference Result 1842 states and 5907 transitions. [2021-08-06 15:26:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:26:16,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:26:16,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:16,202 INFO L225 Difference]: With dead ends: 1842 [2021-08-06 15:26:16,202 INFO L226 Difference]: Without dead ends: 1827 [2021-08-06 15:26:16,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3170.6ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:26:16,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-08-06 15:26:16,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1198. [2021-08-06 15:26:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-08-06 15:26:16,219 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-08-06 15:26:16,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:16,219 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-08-06 15:26:16,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:16,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-08-06 15:26:16,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:16,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:16,221 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:16,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:16,421 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 15:26:16,422 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:16,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1221704100, now seen corresponding path program 37 times [2021-08-06 15:26:16,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:16,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823257104] [2021-08-06 15:26:16,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:16,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:17,565 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 15:26:17,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:17,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823257104] [2021-08-06 15:26:17,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823257104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:17,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710227593] [2021-08-06 15:26:17,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:26:17,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:17,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:17,567 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 15:26:17,568 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 15:26:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:18,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:26:18,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:19,950 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:26:19,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-06 15:26:20,129 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 15:26:20,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710227593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:20,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:20,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:26:20,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473356536] [2021-08-06 15:26:20,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:26:20,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:20,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:26:20,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:26:20,130 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:23,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:23,882 INFO L93 Difference]: Finished difference Result 1869 states and 5964 transitions. [2021-08-06 15:26:23,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:26:23,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:26:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:23,886 INFO L225 Difference]: With dead ends: 1869 [2021-08-06 15:26:23,886 INFO L226 Difference]: Without dead ends: 1854 [2021-08-06 15:26:23,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 3591.0ms TimeCoverageRelationStatistics Valid=494, Invalid=2368, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:26:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-08-06 15:26:23,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1206. [2021-08-06 15:26:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-08-06 15:26:23,905 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-08-06 15:26:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:23,905 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-08-06 15:26:23,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-08-06 15:26:23,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:23,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:23,907 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:23,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 15:26:24,107 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 15:26:24,107 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:24,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:24,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2096944352, now seen corresponding path program 38 times [2021-08-06 15:26:24,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:24,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539433030] [2021-08-06 15:26:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:24,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:24,800 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 15:26:24,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:24,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539433030] [2021-08-06 15:26:24,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539433030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:24,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302007849] [2021-08-06 15:26:24,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:26:24,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:24,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:24,802 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 15:26:24,803 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 15:26:25,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:25,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:26:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:27,219 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-06 15:26:27,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 112 treesize of output 110 [2021-08-06 15:26:30,082 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 15:26:30,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302007849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:30,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:30,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-06 15:26:30,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321088992] [2021-08-06 15:26:30,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:26:30,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:30,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:26:30,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:26:30,083 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:35,564 INFO L93 Difference]: Finished difference Result 2485 states and 7651 transitions. [2021-08-06 15:26:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 15:26:35,564 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:26:35,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:35,569 INFO L225 Difference]: With dead ends: 2485 [2021-08-06 15:26:35,569 INFO L226 Difference]: Without dead ends: 2440 [2021-08-06 15:26:35,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 5345.9ms TimeCoverageRelationStatistics Valid=686, Invalid=3604, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:26:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-08-06 15:26:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1381. [2021-08-06 15:26:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-08-06 15:26:35,593 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-08-06 15:26:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:35,593 INFO L470 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-08-06 15:26:35,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-08-06 15:26:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:35,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:35,595 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:35,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 15:26:35,795 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 15:26:35,796 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:35,796 INFO L82 PathProgramCache]: Analyzing trace with hash 11877124, now seen corresponding path program 7 times [2021-08-06 15:26:35,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:35,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195972890] [2021-08-06 15:26:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:35,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:36,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:36,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195972890] [2021-08-06 15:26:36,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195972890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:36,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256726511] [2021-08-06 15:26:36,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:26:36,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:36,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:36,971 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 15:26:36,971 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 15:26:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:38,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:26:38,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:39,578 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:26:39,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:26:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:39,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256726511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:39,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:39,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:26:39,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805782794] [2021-08-06 15:26:39,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:26:39,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:26:39,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:26:39,961 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:26:40,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:40,911 INFO L93 Difference]: Finished difference Result 1786 states and 5800 transitions. [2021-08-06 15:26:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:26:40,912 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:26:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:40,915 INFO L225 Difference]: With dead ends: 1786 [2021-08-06 15:26:40,915 INFO L226 Difference]: Without dead ends: 1771 [2021-08-06 15:26:40,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1081.3ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:26:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-08-06 15:26:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1392. [2021-08-06 15:26:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.3163191948238677) internal successors, (4613), 1391 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4613 transitions. [2021-08-06 15:26:40,935 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4613 transitions. Word has length 26 [2021-08-06 15:26:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:40,935 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 4613 transitions. [2021-08-06 15:26:40,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:26:40,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4613 transitions. [2021-08-06 15:26:40,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:40,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:40,938 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:40,961 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 15:26:41,151 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 15:26:41,151 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:41,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:41,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2016520892, now seen corresponding path program 8 times [2021-08-06 15:26:41,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:41,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360772012] [2021-08-06 15:26:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:41,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:42,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:42,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360772012] [2021-08-06 15:26:42,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360772012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:42,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477461176] [2021-08-06 15:26:42,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:26:42,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:42,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:42,276 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 15:26:42,278 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 15:26:43,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:43,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:43,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:26:43,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:44,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:26:44,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 96 [2021-08-06 15:26:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:46,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477461176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:46,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:46,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-06 15:26:46,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122394780] [2021-08-06 15:26:46,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:26:46,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:26:46,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:26:46,912 INFO L87 Difference]: Start difference. First operand 1392 states and 4613 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:48,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:48,850 INFO L93 Difference]: Finished difference Result 1831 states and 5928 transitions. [2021-08-06 15:26:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:26:48,850 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:26:48,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:48,855 INFO L225 Difference]: With dead ends: 1831 [2021-08-06 15:26:48,855 INFO L226 Difference]: Without dead ends: 1816 [2021-08-06 15:26:48,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1976.5ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:26:48,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-08-06 15:26:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1395. [2021-08-06 15:26:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 3.317790530846485) internal successors, (4625), 1394 states have internal predecessors, (4625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 4625 transitions. [2021-08-06 15:26:48,881 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 4625 transitions. Word has length 26 [2021-08-06 15:26:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:48,881 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 4625 transitions. [2021-08-06 15:26:48,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 4625 transitions. [2021-08-06 15:26:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:48,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:48,884 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:48,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 15:26:49,084 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 15:26:49,084 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:49,084 INFO L82 PathProgramCache]: Analyzing trace with hash 341036696, now seen corresponding path program 9 times [2021-08-06 15:26:49,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:49,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126735259] [2021-08-06 15:26:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:49,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:49,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:49,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126735259] [2021-08-06 15:26:49,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126735259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:49,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949624577] [2021-08-06 15:26:49,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:26:49,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:49,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:49,548 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 15:26:49,549 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 15:26:51,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:26:51,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:51,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:26:51,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:52,458 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:26:52,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:26:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:52,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949624577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:52,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:52,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:26:52,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95398696] [2021-08-06 15:26:52,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:26:52,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:52,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:26:52,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:26:52,804 INFO L87 Difference]: Start difference. First operand 1395 states and 4625 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:26:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:54,279 INFO L93 Difference]: Finished difference Result 2032 states and 6569 transitions. [2021-08-06 15:26:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:26:54,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:26:54,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:54,283 INFO L225 Difference]: With dead ends: 2032 [2021-08-06 15:26:54,283 INFO L226 Difference]: Without dead ends: 2017 [2021-08-06 15:26:54,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1434.8ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:26:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-08-06 15:26:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1404. [2021-08-06 15:26:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.322166785459729) internal successors, (4661), 1403 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4661 transitions. [2021-08-06 15:26:54,306 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4661 transitions. Word has length 26 [2021-08-06 15:26:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:54,306 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4661 transitions. [2021-08-06 15:26:54,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:26:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4661 transitions. [2021-08-06 15:26:54,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:54,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:54,309 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:54,329 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 15:26:54,509 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 15:26:54,509 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash 173227604, now seen corresponding path program 10 times [2021-08-06 15:26:54,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:54,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358315699] [2021-08-06 15:26:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:54,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:55,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:55,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358315699] [2021-08-06 15:26:55,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358315699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:55,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725331608] [2021-08-06 15:26:55,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:26:55,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:55,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:55,318 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 15:26:55,320 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 15:26:57,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:26:57,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:57,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:26:57,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:57,989 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:26:57,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:26:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:58,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725331608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:58,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:58,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:26:58,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815837442] [2021-08-06 15:26:58,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:26:58,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:58,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:26:58,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:26:58,608 INFO L87 Difference]: Start difference. First operand 1404 states and 4661 transitions. Second operand has 16 states, 16 states have (on average 2.6875) 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 15:26:59,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:59,342 INFO L93 Difference]: Finished difference Result 1711 states and 5596 transitions. [2021-08-06 15:26:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:26:59,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) 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 26 [2021-08-06 15:26:59,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:59,346 INFO L225 Difference]: With dead ends: 1711 [2021-08-06 15:26:59,346 INFO L226 Difference]: Without dead ends: 1696 [2021-08-06 15:26:59,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 855.0ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:26:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-08-06 15:26:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1404. [2021-08-06 15:26:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.322166785459729) internal successors, (4661), 1403 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4661 transitions. [2021-08-06 15:26:59,364 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4661 transitions. Word has length 26 [2021-08-06 15:26:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:59,364 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4661 transitions. [2021-08-06 15:26:59,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) 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 15:26:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4661 transitions. [2021-08-06 15:26:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:59,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:59,366 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:59,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:59,566 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 15:26:59,567 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:59,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:59,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1894288424, now seen corresponding path program 11 times [2021-08-06 15:26:59,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:59,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761645587] [2021-08-06 15:26:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:59,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:00,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:00,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761645587] [2021-08-06 15:27:00,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761645587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:00,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930391340] [2021-08-06 15:27:00,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:00,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:00,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:00,520 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 15:27:00,520 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 15:27:02,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:27:02,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:02,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:27:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:03,122 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:27:03,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 15:27:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:04,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930391340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:04,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:04,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:27:04,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581783234] [2021-08-06 15:27:04,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:27:04,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:04,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:27:04,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:04,252 INFO L87 Difference]: Start difference. First operand 1404 states and 4661 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:06,866 INFO L93 Difference]: Finished difference Result 2335 states and 7497 transitions. [2021-08-06 15:27:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:27:06,867 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:27:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:06,871 INFO L225 Difference]: With dead ends: 2335 [2021-08-06 15:27:06,871 INFO L226 Difference]: Without dead ends: 2305 [2021-08-06 15:27:06,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2435.0ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:27:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-08-06 15:27:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1404. [2021-08-06 15:27:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.322166785459729) internal successors, (4661), 1403 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4661 transitions. [2021-08-06 15:27:06,897 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4661 transitions. Word has length 26 [2021-08-06 15:27:06,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:06,897 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4661 transitions. [2021-08-06 15:27:06,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:06,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4661 transitions. [2021-08-06 15:27:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:06,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:06,900 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:06,927 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 15:27:07,116 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 15:27:07,117 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:07,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1903957512, now seen corresponding path program 12 times [2021-08-06 15:27:07,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:07,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215014068] [2021-08-06 15:27:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:07,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:07,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:07,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215014068] [2021-08-06 15:27:07,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215014068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:07,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629685963] [2021-08-06 15:27:07,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:27:07,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:07,922 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 15:27:07,924 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 15:27:09,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:27:09,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:09,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:27:09,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:10,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:27:10,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:27:10,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 15:27:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:11,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629685963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:11,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:11,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:27:11,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295440381] [2021-08-06 15:27:11,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:11,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:11,865 INFO L87 Difference]: Start difference. First operand 1404 states and 4661 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:15,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:15,582 INFO L93 Difference]: Finished difference Result 2049 states and 6657 transitions. [2021-08-06 15:27:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:27:15,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:27:15,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:15,586 INFO L225 Difference]: With dead ends: 2049 [2021-08-06 15:27:15,586 INFO L226 Difference]: Without dead ends: 2034 [2021-08-06 15:27:15,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 3511.0ms TimeCoverageRelationStatistics Valid=350, Invalid=1630, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:27:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-08-06 15:27:15,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1404. [2021-08-06 15:27:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.322166785459729) internal successors, (4661), 1403 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4661 transitions. [2021-08-06 15:27:15,606 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4661 transitions. Word has length 26 [2021-08-06 15:27:15,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:15,607 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4661 transitions. [2021-08-06 15:27:15,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4661 transitions. [2021-08-06 15:27:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:15,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:15,609 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:15,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:15,809 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 15:27:15,809 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:15,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:15,810 INFO L82 PathProgramCache]: Analyzing trace with hash -922276708, now seen corresponding path program 39 times [2021-08-06 15:27:15,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:15,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408242296] [2021-08-06 15:27:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:15,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:16,634 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 15:27:16,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:16,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408242296] [2021-08-06 15:27:16,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408242296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:16,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78546630] [2021-08-06 15:27:16,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:27:16,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:16,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:16,635 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 15:27:16,636 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 15:27:18,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:27:18,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:18,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:27:18,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:19,734 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:27:19,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-06 15:27:20,050 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 15:27:20,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78546630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:20,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:20,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:27:20,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761750645] [2021-08-06 15:27:20,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:27:20,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:20,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:27:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:20,051 INFO L87 Difference]: Start difference. First operand 1404 states and 4661 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 15:27:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:23,657 INFO L93 Difference]: Finished difference Result 2656 states and 8376 transitions. [2021-08-06 15:27:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:27:23,657 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 26 [2021-08-06 15:27:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:23,661 INFO L225 Difference]: With dead ends: 2656 [2021-08-06 15:27:23,662 INFO L226 Difference]: Without dead ends: 2626 [2021-08-06 15:27:23,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 3346.5ms TimeCoverageRelationStatistics Valid=446, Invalid=2416, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:27:23,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-08-06 15:27:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1409. [2021-08-06 15:27:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.327414772727273) internal successors, (4685), 1408 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4685 transitions. [2021-08-06 15:27:23,686 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4685 transitions. Word has length 26 [2021-08-06 15:27:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:23,686 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 4685 transitions. [2021-08-06 15:27:23,686 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 15:27:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4685 transitions. [2021-08-06 15:27:23,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:23,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:23,689 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:23,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:23,892 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 15:27:23,892 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:23,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:23,893 INFO L82 PathProgramCache]: Analyzing trace with hash 280035660, now seen corresponding path program 40 times [2021-08-06 15:27:23,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:23,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509846700] [2021-08-06 15:27:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:23,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:24,622 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 15:27:24,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:24,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509846700] [2021-08-06 15:27:24,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509846700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:24,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073778970] [2021-08-06 15:27:24,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:27:24,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:24,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:24,624 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 15:27:24,625 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 15:27:26,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:27:26,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:26,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:27:26,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:27,806 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:27:27,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-06 15:27:28,075 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 15:27:28,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073778970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:28,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:28,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:27:28,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764601015] [2021-08-06 15:27:28,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:27:28,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:28,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:27:28,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:28,076 INFO L87 Difference]: Start difference. First operand 1409 states and 4685 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 15:27:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:31,804 INFO L93 Difference]: Finished difference Result 2864 states and 9044 transitions. [2021-08-06 15:27:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:27:31,805 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 26 [2021-08-06 15:27:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:31,810 INFO L225 Difference]: With dead ends: 2864 [2021-08-06 15:27:31,810 INFO L226 Difference]: Without dead ends: 2819 [2021-08-06 15:27:31,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 3470.8ms TimeCoverageRelationStatistics Valid=591, Invalid=2715, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:27:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-08-06 15:27:31,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 1426. [2021-08-06 15:27:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.343157894736842) internal successors, (4764), 1425 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4764 transitions. [2021-08-06 15:27:31,835 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4764 transitions. Word has length 26 [2021-08-06 15:27:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:31,835 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 4764 transitions. [2021-08-06 15:27:31,835 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 15:27:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4764 transitions. [2021-08-06 15:27:31,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:31,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:31,837 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:31,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:32,038 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 15:27:32,042 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:32,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:32,042 INFO L82 PathProgramCache]: Analyzing trace with hash 2113684312, now seen corresponding path program 41 times [2021-08-06 15:27:32,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:32,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447097349] [2021-08-06 15:27:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:32,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:32,666 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 15:27:32,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:32,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447097349] [2021-08-06 15:27:32,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447097349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:32,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850680509] [2021-08-06 15:27:32,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:32,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:32,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:32,668 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 15:27:32,669 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 15:27:34,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:27:34,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:34,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:27:34,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:35,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:27:35,698 INFO L354 Elim1Store]: treesize reduction 20, result has 60.8 percent of original size [2021-08-06 15:27:35,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 128 treesize of output 106 [2021-08-06 15:27:36,816 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 15:27:36,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850680509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:36,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:36,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:27:36,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215183726] [2021-08-06 15:27:36,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:27:36,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:27:36,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:36,817 INFO L87 Difference]: Start difference. First operand 1426 states and 4764 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 15:27:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:41,871 INFO L93 Difference]: Finished difference Result 3458 states and 10757 transitions. [2021-08-06 15:27:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 15:27:41,872 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 26 [2021-08-06 15:27:41,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:41,878 INFO L225 Difference]: With dead ends: 3458 [2021-08-06 15:27:41,878 INFO L226 Difference]: Without dead ends: 3398 [2021-08-06 15:27:41,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 4676.6ms TimeCoverageRelationStatistics Valid=812, Invalid=3348, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 15:27:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2021-08-06 15:27:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 1439. [2021-08-06 15:27:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 3.3546592489568847) internal successors, (4824), 1438 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4824 transitions. [2021-08-06 15:27:41,907 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4824 transitions. Word has length 26 [2021-08-06 15:27:41,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:41,908 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 4824 transitions. [2021-08-06 15:27:41,908 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 15:27:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4824 transitions. [2021-08-06 15:27:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:41,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:41,910 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:41,938 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 15:27:42,110 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 15:27:42,111 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:42,111 INFO L82 PathProgramCache]: Analyzing trace with hash 270672448, now seen corresponding path program 13 times [2021-08-06 15:27:42,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:42,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392210041] [2021-08-06 15:27:42,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:42,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:42,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:42,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392210041] [2021-08-06 15:27:42,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392210041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:42,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291840569] [2021-08-06 15:27:42,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:27:42,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:42,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:42,901 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 15:27:42,902 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 15:27:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:45,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:27:45,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:46,470 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:27:46,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:27:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:46,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291840569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:46,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:46,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:27:46,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354929789] [2021-08-06 15:27:46,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:27:46,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:27:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:46,836 INFO L87 Difference]: Start difference. First operand 1439 states and 4824 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:27:47,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:47,686 INFO L93 Difference]: Finished difference Result 1831 states and 6013 transitions. [2021-08-06 15:27:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:27:47,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:27:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:47,689 INFO L225 Difference]: With dead ends: 1831 [2021-08-06 15:27:47,689 INFO L226 Difference]: Without dead ends: 1816 [2021-08-06 15:27:47,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1000.4ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:27:47,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-08-06 15:27:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1448. [2021-08-06 15:27:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.354526606772633) internal successors, (4854), 1447 states have internal predecessors, (4854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4854 transitions. [2021-08-06 15:27:47,707 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4854 transitions. Word has length 26 [2021-08-06 15:27:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:47,707 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 4854 transitions. [2021-08-06 15:27:47,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:27:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4854 transitions. [2021-08-06 15:27:47,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:47,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:47,710 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:47,732 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 15:27:47,910 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 15:27:47,910 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:47,911 INFO L82 PathProgramCache]: Analyzing trace with hash 599832020, now seen corresponding path program 14 times [2021-08-06 15:27:47,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:47,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108286300] [2021-08-06 15:27:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:47,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:48,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:48,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108286300] [2021-08-06 15:27:48,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108286300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:48,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018793095] [2021-08-06 15:27:48,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:27:48,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:48,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:48,468 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 15:27:48,469 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 15:27:50,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:27:50,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:27:50,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:52,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:27:52,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 96 [2021-08-06 15:27:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:53,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018793095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:53,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:53,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-06 15:27:53,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728011122] [2021-08-06 15:27:53,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:53,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:53,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:53,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:53,562 INFO L87 Difference]: Start difference. First operand 1448 states and 4854 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:55,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:55,874 INFO L93 Difference]: Finished difference Result 2021 states and 6563 transitions. [2021-08-06 15:27:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:27:55,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:27:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:55,878 INFO L225 Difference]: With dead ends: 2021 [2021-08-06 15:27:55,878 INFO L226 Difference]: Without dead ends: 2006 [2021-08-06 15:27:55,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2170.5ms TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:27:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-08-06 15:27:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1440. [2021-08-06 15:27:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.36275191104934) internal successors, (4839), 1439 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4839 transitions. [2021-08-06 15:27:55,909 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4839 transitions. Word has length 26 [2021-08-06 15:27:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:55,909 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 4839 transitions. [2021-08-06 15:27:55,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4839 transitions. [2021-08-06 15:27:55,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:55,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:55,915 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:55,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:56,128 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 15:27:56,129 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:56,129 INFO L82 PathProgramCache]: Analyzing trace with hash 432022928, now seen corresponding path program 15 times [2021-08-06 15:27:56,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:56,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619965516] [2021-08-06 15:27:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:56,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:57,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:57,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619965516] [2021-08-06 15:27:57,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619965516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:57,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737471725] [2021-08-06 15:27:57,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:27:57,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:57,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:57,087 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 15:27:57,088 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 15:27:59,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:27:59,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:59,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:27:59,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:00,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:28:00,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 94 [2021-08-06 15:28:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:03,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737471725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:03,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:03,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 15:28:03,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411820617] [2021-08-06 15:28:03,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:28:03,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:03,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:28:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:28:03,218 INFO L87 Difference]: Start difference. First operand 1440 states and 4839 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:06,976 INFO L93 Difference]: Finished difference Result 2079 states and 6710 transitions. [2021-08-06 15:28:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:28:06,977 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:28:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:06,980 INFO L225 Difference]: With dead ends: 2079 [2021-08-06 15:28:06,980 INFO L226 Difference]: Without dead ends: 2064 [2021-08-06 15:28:06,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 3673.5ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:28:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-08-06 15:28:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1453. [2021-08-06 15:28:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.3677685950413223) internal successors, (4890), 1452 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4890 transitions. [2021-08-06 15:28:07,003 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4890 transitions. Word has length 26 [2021-08-06 15:28:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:07,003 INFO L470 AbstractCegarLoop]: Abstraction has 1453 states and 4890 transitions. [2021-08-06 15:28:07,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4890 transitions. [2021-08-06 15:28:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:07,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:07,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:07,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:07,205 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 15:28:07,206 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:07,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:07,206 INFO L82 PathProgramCache]: Analyzing trace with hash 412054902, now seen corresponding path program 16 times [2021-08-06 15:28:07,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:07,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888586164] [2021-08-06 15:28:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:07,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:08,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:08,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888586164] [2021-08-06 15:28:08,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888586164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:08,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999259936] [2021-08-06 15:28:08,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:28:08,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:08,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:08,428 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 15:28:08,431 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 15:28:11,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:28:11,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:11,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:28:11,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:11,871 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:28:11,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 15:28:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:13,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999259936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:13,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:13,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:28:13,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333183604] [2021-08-06 15:28:13,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:28:13,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:13,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:28:13,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:28:13,083 INFO L87 Difference]: Start difference. First operand 1453 states and 4890 transitions. Second operand has 16 states, 16 states have (on average 2.6875) 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 15:28:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:13,867 INFO L93 Difference]: Finished difference Result 1934 states and 6346 transitions. [2021-08-06 15:28:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:28:13,867 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) 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 26 [2021-08-06 15:28:13,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:13,871 INFO L225 Difference]: With dead ends: 1934 [2021-08-06 15:28:13,871 INFO L226 Difference]: Without dead ends: 1919 [2021-08-06 15:28:13,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 982.8ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:28:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-08-06 15:28:13,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1449. [2021-08-06 15:28:13,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.3625690607734806) internal successors, (4869), 1448 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:13,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4869 transitions. [2021-08-06 15:28:13,893 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4869 transitions. Word has length 26 [2021-08-06 15:28:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:13,893 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 4869 transitions. [2021-08-06 15:28:13,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) 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 15:28:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4869 transitions. [2021-08-06 15:28:13,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:13,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:13,895 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:13,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 15:28:14,095 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 15:28:14,096 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:14,096 INFO L82 PathProgramCache]: Analyzing trace with hash -2132214460, now seen corresponding path program 17 times [2021-08-06 15:28:14,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:14,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302585525] [2021-08-06 15:28:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:14,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:15,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:15,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302585525] [2021-08-06 15:28:15,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302585525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:15,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110783940] [2021-08-06 15:28:15,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:28:15,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:15,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:15,250 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 15:28:15,251 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 15:28:18,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:28:18,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:28:18,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:19,345 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:28:19,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:28:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:19,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110783940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:19,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:19,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:28:19,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393281659] [2021-08-06 15:28:19,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:28:19,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:19,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:28:19,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:28:19,853 INFO L87 Difference]: Start difference. First operand 1449 states and 4869 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:21,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:21,783 INFO L93 Difference]: Finished difference Result 2052 states and 6704 transitions. [2021-08-06 15:28:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:28:21,783 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:28:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:21,787 INFO L225 Difference]: With dead ends: 2052 [2021-08-06 15:28:21,787 INFO L226 Difference]: Without dead ends: 2022 [2021-08-06 15:28:21,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 2042.8ms TimeCoverageRelationStatistics Valid=247, Invalid=1235, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:28:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-08-06 15:28:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1452. [2021-08-06 15:28:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.363886974500345) internal successors, (4881), 1451 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4881 transitions. [2021-08-06 15:28:21,813 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4881 transitions. Word has length 26 [2021-08-06 15:28:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:21,813 INFO L470 AbstractCegarLoop]: Abstraction has 1452 states and 4881 transitions. [2021-08-06 15:28:21,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4881 transitions. [2021-08-06 15:28:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:21,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:21,816 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:21,839 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 15:28:22,016 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 15:28:22,016 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:22,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:22,016 INFO L82 PathProgramCache]: Analyzing trace with hash 545220056, now seen corresponding path program 18 times [2021-08-06 15:28:22,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:22,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766846798] [2021-08-06 15:28:22,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:22,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:22,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:22,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766846798] [2021-08-06 15:28:22,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766846798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:22,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726147115] [2021-08-06 15:28:22,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:28:22,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:22,516 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 15:28:22,516 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 15:28:25,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:28:25,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:25,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:28:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:26,220 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:28:26,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 15:28:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:27,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726147115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:27,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:27,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:28:27,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487150389] [2021-08-06 15:28:27,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:27,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:27,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:27,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:27,611 INFO L87 Difference]: Start difference. First operand 1452 states and 4881 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:28:29,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:29,043 INFO L93 Difference]: Finished difference Result 1958 states and 6425 transitions. [2021-08-06 15:28:29,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:28:29,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:28:29,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:29,046 INFO L225 Difference]: With dead ends: 1958 [2021-08-06 15:28:29,046 INFO L226 Difference]: Without dead ends: 1943 [2021-08-06 15:28:29,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1507.8ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:28:29,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-08-06 15:28:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1446. [2021-08-06 15:28:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.3612456747404846) internal successors, (4857), 1445 states have internal predecessors, (4857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4857 transitions. [2021-08-06 15:28:29,075 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4857 transitions. Word has length 26 [2021-08-06 15:28:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:29,075 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 4857 transitions. [2021-08-06 15:28:29,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:28:29,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4857 transitions. [2021-08-06 15:28:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:29,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:29,078 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:29,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:29,304 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 15:28:29,305 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:29,305 INFO L82 PathProgramCache]: Analyzing trace with hash 62339164, now seen corresponding path program 19 times [2021-08-06 15:28:29,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:29,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146839608] [2021-08-06 15:28:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:29,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:29,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:29,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146839608] [2021-08-06 15:28:29,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146839608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:29,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981963304] [2021-08-06 15:28:29,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:28:29,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:29,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:29,913 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 15:28:29,913 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 15:28:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:32,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:28:32,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:34,149 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:28:34,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:28:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:34,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981963304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:34,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:34,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:28:34,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714322761] [2021-08-06 15:28:34,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:34,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:34,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:34,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:34,498 INFO L87 Difference]: Start difference. First operand 1446 states and 4857 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:28:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:35,408 INFO L93 Difference]: Finished difference Result 1903 states and 6236 transitions. [2021-08-06 15:28:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:28:35,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:28:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:35,412 INFO L225 Difference]: With dead ends: 1903 [2021-08-06 15:28:35,412 INFO L226 Difference]: Without dead ends: 1882 [2021-08-06 15:28:35,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 926.5ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:28:35,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-08-06 15:28:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1487. [2021-08-06 15:28:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.357335127860027) internal successors, (4989), 1486 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4989 transitions. [2021-08-06 15:28:35,432 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4989 transitions. Word has length 26 [2021-08-06 15:28:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:35,433 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 4989 transitions. [2021-08-06 15:28:35,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:28:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4989 transitions. [2021-08-06 15:28:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:35,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:35,435 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:35,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:35,635 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 15:28:35,636 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:35,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash -105469928, now seen corresponding path program 20 times [2021-08-06 15:28:35,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:35,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576764782] [2021-08-06 15:28:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:35,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:36,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:36,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576764782] [2021-08-06 15:28:36,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576764782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:36,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290463487] [2021-08-06 15:28:36,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:36,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:36,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:36,358 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 15:28:36,359 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 15:28:39,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:39,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:28:39,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:40,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:28:40,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 94 [2021-08-06 15:28:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:42,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290463487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:42,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:42,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 15:28:42,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288669460] [2021-08-06 15:28:42,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:28:42,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:42,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:28:42,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:28:42,572 INFO L87 Difference]: Start difference. First operand 1487 states and 4989 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:45,034 INFO L93 Difference]: Finished difference Result 2084 states and 6671 transitions. [2021-08-06 15:28:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:28:45,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:28:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:45,038 INFO L225 Difference]: With dead ends: 2084 [2021-08-06 15:28:45,039 INFO L226 Difference]: Without dead ends: 2059 [2021-08-06 15:28:45,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 2545.5ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:28:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-08-06 15:28:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1501. [2021-08-06 15:28:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 3.366) internal successors, (5049), 1500 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 5049 transitions. [2021-08-06 15:28:45,060 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 5049 transitions. Word has length 26 [2021-08-06 15:28:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:45,060 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 5049 transitions. [2021-08-06 15:28:45,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:45,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 5049 transitions. [2021-08-06 15:28:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:45,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:45,063 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:45,090 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 15:28:45,271 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 15:28:45,272 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:45,272 INFO L82 PathProgramCache]: Analyzing trace with hash -125437954, now seen corresponding path program 21 times [2021-08-06 15:28:45,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:45,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123807284] [2021-08-06 15:28:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:45,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:45,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:45,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123807284] [2021-08-06 15:28:45,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123807284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:45,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936155925] [2021-08-06 15:28:45,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:28:45,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:45,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:45,720 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 15:28:45,721 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 15:28:49,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:28:49,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:49,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:28:49,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:49,810 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:28:49,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 15:28:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:51,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936155925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:51,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:51,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 15:28:51,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032450740] [2021-08-06 15:28:51,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:28:51,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:51,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:28:51,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:28:51,058 INFO L87 Difference]: Start difference. First operand 1501 states and 5049 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:52,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:52,706 INFO L93 Difference]: Finished difference Result 2000 states and 6554 transitions. [2021-08-06 15:28:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:28:52,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:28:52,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:52,710 INFO L225 Difference]: With dead ends: 2000 [2021-08-06 15:28:52,710 INFO L226 Difference]: Without dead ends: 1971 [2021-08-06 15:28:52,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1570.2ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:28:52,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-08-06 15:28:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1504. [2021-08-06 15:28:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 3.366600133067199) internal successors, (5060), 1503 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 5060 transitions. [2021-08-06 15:28:52,730 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 5060 transitions. Word has length 26 [2021-08-06 15:28:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:52,730 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 5060 transitions. [2021-08-06 15:28:52,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 5060 transitions. [2021-08-06 15:28:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:52,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:52,732 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:52,758 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 15:28:52,934 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 15:28:52,934 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:52,935 INFO L82 PathProgramCache]: Analyzing trace with hash 193303520, now seen corresponding path program 22 times [2021-08-06 15:28:52,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:52,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32358722] [2021-08-06 15:28:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:52,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:53,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:53,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32358722] [2021-08-06 15:28:53,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32358722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:53,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256080968] [2021-08-06 15:28:53,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:28:53,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:53,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:53,680 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 15:28:53,681 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 15:28:57,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:28:57,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:57,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:28:57,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:57,868 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:28:57,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 70 [2021-08-06 15:28:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:58,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256080968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:58,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:58,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:28:58,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796156256] [2021-08-06 15:28:58,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:28:58,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:58,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:28:58,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:28:58,444 INFO L87 Difference]: Start difference. First operand 1504 states and 5060 transitions. Second operand has 16 states, 16 states have (on average 2.6875) 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 15:28:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:58,796 INFO L93 Difference]: Finished difference Result 1579 states and 5251 transitions. [2021-08-06 15:28:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:28:58,796 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) 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 26 [2021-08-06 15:28:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:58,799 INFO L225 Difference]: With dead ends: 1579 [2021-08-06 15:28:58,799 INFO L226 Difference]: Without dead ends: 1564 [2021-08-06 15:28:58,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:58,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-08-06 15:28:58,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1510. [2021-08-06 15:28:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.3684559310801854) internal successors, (5083), 1509 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5083 transitions. [2021-08-06 15:28:58,817 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5083 transitions. Word has length 26 [2021-08-06 15:28:58,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:58,817 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 5083 transitions. [2021-08-06 15:28:58,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) 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 15:28:58,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5083 transitions. [2021-08-06 15:28:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:58,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:58,819 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:58,844 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 15:28:59,020 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 15:28:59,020 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:59,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:59,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1764129120, now seen corresponding path program 23 times [2021-08-06 15:28:59,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:59,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818808996] [2021-08-06 15:28:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:59,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:59,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:59,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818808996] [2021-08-06 15:28:59,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818808996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:59,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264432271] [2021-08-06 15:28:59,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:28:59,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:59,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:59,612 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 15:28:59,612 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 15:29:03,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:29:03,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:29:03,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:03,869 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:29:03,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 77 [2021-08-06 15:29:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:04,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264432271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:04,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:04,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:29:04,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954846137] [2021-08-06 15:29:04,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:29:04,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:04,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:29:04,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:29:04,986 INFO L87 Difference]: Start difference. First operand 1510 states and 5083 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:29:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:05,899 INFO L93 Difference]: Finished difference Result 2020 states and 6633 transitions. [2021-08-06 15:29:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:29:05,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:29:05,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:05,903 INFO L225 Difference]: With dead ends: 2020 [2021-08-06 15:29:05,903 INFO L226 Difference]: Without dead ends: 1995 [2021-08-06 15:29:05,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1014.5ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:29:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-08-06 15:29:05,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1517. [2021-08-06 15:29:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3726912928759893) internal successors, (5113), 1516 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5113 transitions. [2021-08-06 15:29:05,924 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5113 transitions. Word has length 26 [2021-08-06 15:29:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:05,924 INFO L470 AbstractCegarLoop]: Abstraction has 1517 states and 5113 transitions. [2021-08-06 15:29:05,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:29:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5113 transitions. [2021-08-06 15:29:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:05,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:05,926 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:05,952 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 15:29:06,126 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 15:29:06,127 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:06,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:06,127 INFO L82 PathProgramCache]: Analyzing trace with hash -340731392, now seen corresponding path program 24 times [2021-08-06 15:29:06,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:06,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159724019] [2021-08-06 15:29:06,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:06,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:06,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:06,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159724019] [2021-08-06 15:29:06,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159724019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:06,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489495975] [2021-08-06 15:29:06,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:29:06,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:06,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:06,918 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 15:29:06,919 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 15:29:10,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:29:10,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:10,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:29:10,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:11,579 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:29:11,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:29:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:12,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489495975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:12,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:12,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:29:12,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291143287] [2021-08-06 15:29:12,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:29:12,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:12,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:29:12,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:29:12,107 INFO L87 Difference]: Start difference. First operand 1517 states and 5113 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:29:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:12,952 INFO L93 Difference]: Finished difference Result 1908 states and 6316 transitions. [2021-08-06 15:29:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:29:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:29:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:12,955 INFO L225 Difference]: With dead ends: 1908 [2021-08-06 15:29:12,955 INFO L226 Difference]: Without dead ends: 1893 [2021-08-06 15:29:12,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 981.7ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:29:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-08-06 15:29:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1528. [2021-08-06 15:29:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.372626064178127) internal successors, (5150), 1527 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 5150 transitions. [2021-08-06 15:29:12,974 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 5150 transitions. Word has length 26 [2021-08-06 15:29:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:12,974 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 5150 transitions. [2021-08-06 15:29:12,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:29:12,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 5150 transitions. [2021-08-06 15:29:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:12,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:12,976 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:13,002 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 15:29:13,177 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 15:29:13,177 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1958264172, now seen corresponding path program 25 times [2021-08-06 15:29:13,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:13,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945505370] [2021-08-06 15:29:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:13,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:13,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:13,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945505370] [2021-08-06 15:29:13,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945505370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:13,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072267655] [2021-08-06 15:29:13,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:29:13,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:13,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:13,729 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 15:29:13,730 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 15:29:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:17,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:29:17,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:18,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:29:18,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:29:18,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 15:29:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:19,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072267655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:19,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:19,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:29:19,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106903334] [2021-08-06 15:29:19,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:29:19,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:29:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:29:19,335 INFO L87 Difference]: Start difference. First operand 1528 states and 5150 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:21,237 INFO L93 Difference]: Finished difference Result 2182 states and 7179 transitions. [2021-08-06 15:29:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:29:21,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:29:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:21,241 INFO L225 Difference]: With dead ends: 2182 [2021-08-06 15:29:21,241 INFO L226 Difference]: Without dead ends: 2163 [2021-08-06 15:29:21,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1808.6ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:29:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-08-06 15:29:21,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1529. [2021-08-06 15:29:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.3756544502617802) internal successors, (5158), 1528 states have internal predecessors, (5158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5158 transitions. [2021-08-06 15:29:21,264 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5158 transitions. Word has length 26 [2021-08-06 15:29:21,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:21,264 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 5158 transitions. [2021-08-06 15:29:21,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5158 transitions. [2021-08-06 15:29:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:21,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:21,266 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:21,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-06 15:29:21,466 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 15:29:21,466 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:21,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:21,466 INFO L82 PathProgramCache]: Analyzing trace with hash 646760220, now seen corresponding path program 26 times [2021-08-06 15:29:21,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:21,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078031986] [2021-08-06 15:29:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:21,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:22,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:22,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078031986] [2021-08-06 15:29:22,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078031986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:22,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478623687] [2021-08-06 15:29:22,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:29:22,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:22,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:22,060 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 15:29:22,060 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 15:29:25,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:29:25,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:25,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:29:25,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:26,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:29:26,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:29:26,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2021-08-06 15:29:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:27,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478623687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:27,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:27,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:29:27,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615129478] [2021-08-06 15:29:27,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:29:27,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:27,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:29:27,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:29:27,854 INFO L87 Difference]: Start difference. First operand 1529 states and 5158 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:29,115 INFO L93 Difference]: Finished difference Result 2033 states and 6704 transitions. [2021-08-06 15:29:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:29:29,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:29:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:29,119 INFO L225 Difference]: With dead ends: 2033 [2021-08-06 15:29:29,119 INFO L226 Difference]: Without dead ends: 2008 [2021-08-06 15:29:29,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1342.4ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:29:29,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-08-06 15:29:29,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1535. [2021-08-06 15:29:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3741851368970015) internal successors, (5176), 1534 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5176 transitions. [2021-08-06 15:29:29,139 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5176 transitions. Word has length 26 [2021-08-06 15:29:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:29,139 INFO L470 AbstractCegarLoop]: Abstraction has 1535 states and 5176 transitions. [2021-08-06 15:29:29,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5176 transitions. [2021-08-06 15:29:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:29,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:29,141 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:29,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 15:29:29,341 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 15:29:29,342 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:29,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2020528988, now seen corresponding path program 42 times [2021-08-06 15:29:29,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:29,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594292278] [2021-08-06 15:29:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:29,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:30,217 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 15:29:30,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:30,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594292278] [2021-08-06 15:29:30,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594292278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:30,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820986403] [2021-08-06 15:29:30,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:29:30,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:30,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:30,218 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 15:29:30,220 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 15:29:34,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:29:34,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:34,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:29:34,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:35,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:29:35,358 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 15:29:35,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 84 [2021-08-06 15:29:35,514 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 15:29:35,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820986403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:35,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:35,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:29:35,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059056050] [2021-08-06 15:29:35,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:29:35,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:35,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:29:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:29:35,515 INFO L87 Difference]: Start difference. First operand 1535 states and 5176 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:36,817 INFO L93 Difference]: Finished difference Result 1984 states and 6509 transitions. [2021-08-06 15:29:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:29:36,817 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:29:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:36,821 INFO L225 Difference]: With dead ends: 1984 [2021-08-06 15:29:36,821 INFO L226 Difference]: Without dead ends: 1958 [2021-08-06 15:29:36,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1278.9ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:29:36,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-08-06 15:29:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1539. [2021-08-06 15:29:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.3719115734720417) internal successors, (5186), 1538 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5186 transitions. [2021-08-06 15:29:36,841 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5186 transitions. Word has length 26 [2021-08-06 15:29:36,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:36,841 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 5186 transitions. [2021-08-06 15:29:36,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:36,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5186 transitions. [2021-08-06 15:29:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:36,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:36,843 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:36,870 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 15:29:37,043 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 15:29:37,044 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:37,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:37,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1206563744, now seen corresponding path program 43 times [2021-08-06 15:29:37,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:37,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229092271] [2021-08-06 15:29:37,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:37,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:37,760 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 15:29:37,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:37,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229092271] [2021-08-06 15:29:37,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229092271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:37,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37862841] [2021-08-06 15:29:37,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:29:37,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:37,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:37,762 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 15:29:37,762 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 15:29:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:41,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:29:41,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:42,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:29:42,705 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 15:29:42,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 128 treesize of output 84 [2021-08-06 15:29:42,949 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 15:29:42,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37862841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:42,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:42,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:29:42,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698701613] [2021-08-06 15:29:42,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:29:42,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:42,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:29:42,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:29:42,950 INFO L87 Difference]: Start difference. First operand 1539 states and 5186 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:44,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:44,892 INFO L93 Difference]: Finished difference Result 2159 states and 7085 transitions. [2021-08-06 15:29:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:29:44,892 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:29:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:44,895 INFO L225 Difference]: With dead ends: 2159 [2021-08-06 15:29:44,896 INFO L226 Difference]: Without dead ends: 2144 [2021-08-06 15:29:44,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1944.6ms TimeCoverageRelationStatistics Valid=441, Invalid=1815, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:29:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-08-06 15:29:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1539. [2021-08-06 15:29:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.3719115734720417) internal successors, (5186), 1538 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5186 transitions. [2021-08-06 15:29:44,917 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5186 transitions. Word has length 26 [2021-08-06 15:29:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:44,917 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 5186 transitions. [2021-08-06 15:29:44,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:44,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5186 transitions. [2021-08-06 15:29:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:44,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:44,919 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:44,946 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 15:29:45,119 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 15:29:45,120 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:45,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1794939168, now seen corresponding path program 27 times [2021-08-06 15:29:45,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:45,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954479320] [2021-08-06 15:29:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:45,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:45,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:45,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954479320] [2021-08-06 15:29:45,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954479320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:45,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913821418] [2021-08-06 15:29:45,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:29:45,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:45,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:45,925 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 15:29:45,925 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 15:29:50,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:29:50,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:50,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:29:50,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:51,922 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 15:29:51,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 82 [2021-08-06 15:29:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:52,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913821418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:52,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:52,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:29:52,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837998209] [2021-08-06 15:29:52,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:29:52,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:52,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:29:52,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:29:52,452 INFO L87 Difference]: Start difference. First operand 1539 states and 5186 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:29:53,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:53,794 INFO L93 Difference]: Finished difference Result 2039 states and 6641 transitions. [2021-08-06 15:29:53,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:29:53,794 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:29:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:53,797 INFO L225 Difference]: With dead ends: 2039 [2021-08-06 15:29:53,797 INFO L226 Difference]: Without dead ends: 2024 [2021-08-06 15:29:53,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1336.8ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:29:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-08-06 15:29:53,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1550. [2021-08-06 15:29:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.3724983860555198) internal successors, (5224), 1549 states have internal predecessors, (5224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5224 transitions. [2021-08-06 15:29:53,827 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5224 transitions. Word has length 26 [2021-08-06 15:29:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:53,827 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5224 transitions. [2021-08-06 15:29:53,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:29:53,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5224 transitions. [2021-08-06 15:29:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:53,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:53,829 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:53,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 15:29:54,030 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 15:29:54,030 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:54,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:54,031 INFO L82 PathProgramCache]: Analyzing trace with hash -244557604, now seen corresponding path program 44 times [2021-08-06 15:29:54,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:54,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005190326] [2021-08-06 15:29:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:54,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:54,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:54,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005190326] [2021-08-06 15:29:54,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005190326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:54,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776977636] [2021-08-06 15:29:54,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:29:54,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:54,818 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 15:29:54,819 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 15:29:59,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:29:59,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:59,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:29:59,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:00,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:30:00,390 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 15:30:00,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 84 [2021-08-06 15:30:00,560 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 15:30:00,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776977636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:00,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:00,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:30:00,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249823634] [2021-08-06 15:30:00,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:30:00,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:00,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:30:00,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:30:00,561 INFO L87 Difference]: Start difference. First operand 1550 states and 5224 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:03,328 INFO L93 Difference]: Finished difference Result 2182 states and 7048 transitions. [2021-08-06 15:30:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:30:03,328 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:30:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:03,332 INFO L225 Difference]: With dead ends: 2182 [2021-08-06 15:30:03,332 INFO L226 Difference]: Without dead ends: 2160 [2021-08-06 15:30:03,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2501.2ms TimeCoverageRelationStatistics Valid=418, Invalid=1934, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:30:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-08-06 15:30:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1557. [2021-08-06 15:30:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3733933161953726) internal successors, (5249), 1556 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:03,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5249 transitions. [2021-08-06 15:30:03,353 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5249 transitions. Word has length 26 [2021-08-06 15:30:03,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:03,354 INFO L470 AbstractCegarLoop]: Abstraction has 1557 states and 5249 transitions. [2021-08-06 15:30:03,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:03,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5249 transitions. [2021-08-06 15:30:03,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:03,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:03,356 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:03,512 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 15:30:03,560 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 15:30:03,561 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:03,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:03,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1220876448, now seen corresponding path program 45 times [2021-08-06 15:30:03,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:03,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465005334] [2021-08-06 15:30:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:03,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:04,179 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 15:30:04,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:04,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465005334] [2021-08-06 15:30:04,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465005334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:04,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684834129] [2021-08-06 15:30:04,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:30:04,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:04,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:04,180 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 15:30:04,181 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 15:30:08,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:30:08,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:08,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:30:08,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:09,537 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 15:30:09,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 118 treesize of output 102 [2021-08-06 15:30:10,868 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 15:30:10,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684834129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:10,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:10,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-06 15:30:10,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723863138] [2021-08-06 15:30:10,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:30:10,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:10,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:30:10,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:30:10,869 INFO L87 Difference]: Start difference. First operand 1557 states and 5249 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:13,896 INFO L93 Difference]: Finished difference Result 3030 states and 9621 transitions. [2021-08-06 15:30:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:30:13,897 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:30:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:13,902 INFO L225 Difference]: With dead ends: 3030 [2021-08-06 15:30:13,902 INFO L226 Difference]: Without dead ends: 3000 [2021-08-06 15:30:13,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 2668.4ms TimeCoverageRelationStatistics Valid=425, Invalid=2437, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:30:13,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-08-06 15:30:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 1601. [2021-08-06 15:30:13,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.369375) internal successors, (5391), 1600 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5391 transitions. [2021-08-06 15:30:13,930 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5391 transitions. Word has length 26 [2021-08-06 15:30:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:13,930 INFO L470 AbstractCegarLoop]: Abstraction has 1601 states and 5391 transitions. [2021-08-06 15:30:13,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5391 transitions. [2021-08-06 15:30:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:13,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:13,932 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:13,960 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 15:30:14,132 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 15:30:14,133 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:14,133 INFO L82 PathProgramCache]: Analyzing trace with hash -205068792, now seen corresponding path program 28 times [2021-08-06 15:30:14,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:14,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649833126] [2021-08-06 15:30:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:14,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:14,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:14,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649833126] [2021-08-06 15:30:14,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649833126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:14,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636026977] [2021-08-06 15:30:14,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:30:14,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:14,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:14,736 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 15:30:14,736 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 15:30:19,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:30:19,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:19,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:30:19,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:20,382 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:30:20,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:30:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:20,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636026977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:20,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:20,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:30:20,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630479381] [2021-08-06 15:30:20,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:30:20,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:20,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:30:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:30:20,887 INFO L87 Difference]: Start difference. First operand 1601 states and 5391 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:30:22,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:22,799 INFO L93 Difference]: Finished difference Result 2155 states and 7007 transitions. [2021-08-06 15:30:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:30:22,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:30:22,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:22,803 INFO L225 Difference]: With dead ends: 2155 [2021-08-06 15:30:22,803 INFO L226 Difference]: Without dead ends: 2140 [2021-08-06 15:30:22,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1821.3ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:30:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-08-06 15:30:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1606. [2021-08-06 15:30:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.370716510903427) internal successors, (5410), 1605 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5410 transitions. [2021-08-06 15:30:22,826 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5410 transitions. Word has length 26 [2021-08-06 15:30:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:22,826 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 5410 transitions. [2021-08-06 15:30:22,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:30:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5410 transitions. [2021-08-06 15:30:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:22,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:22,828 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:22,857 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 15:30:23,028 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 15:30:23,029 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1822601572, now seen corresponding path program 29 times [2021-08-06 15:30:23,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:23,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664126588] [2021-08-06 15:30:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:23,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:23,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:23,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664126588] [2021-08-06 15:30:23,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664126588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:23,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234601591] [2021-08-06 15:30:23,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:30:23,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:23,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:23,577 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 15:30:23,607 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 15:30:28,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:30:28,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:28,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:30:28,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:29,038 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:30:29,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 15:30:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:30,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234601591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:30,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:30,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:30:30,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900177336] [2021-08-06 15:30:30,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:30:30,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:30,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:30:30,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:30:30,310 INFO L87 Difference]: Start difference. First operand 1606 states and 5410 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:32,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:32,670 INFO L93 Difference]: Finished difference Result 2307 states and 7462 transitions. [2021-08-06 15:30:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:30:32,670 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:30:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:32,674 INFO L225 Difference]: With dead ends: 2307 [2021-08-06 15:30:32,674 INFO L226 Difference]: Without dead ends: 2288 [2021-08-06 15:30:32,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2214.1ms TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:30:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2021-08-06 15:30:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 1599. [2021-08-06 15:30:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.3692115143929913) internal successors, (5384), 1598 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5384 transitions. [2021-08-06 15:30:32,698 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5384 transitions. Word has length 26 [2021-08-06 15:30:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:32,698 INFO L470 AbstractCegarLoop]: Abstraction has 1599 states and 5384 transitions. [2021-08-06 15:30:32,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:32,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5384 transitions. [2021-08-06 15:30:32,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:32,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:32,701 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:32,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:32,901 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 15:30:32,902 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:32,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:32,902 INFO L82 PathProgramCache]: Analyzing trace with hash -18564080, now seen corresponding path program 46 times [2021-08-06 15:30:32,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:32,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072131328] [2021-08-06 15:30:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:32,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:33,466 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 15:30:33,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:33,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072131328] [2021-08-06 15:30:33,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072131328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:33,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997094963] [2021-08-06 15:30:33,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:30:33,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:33,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:33,469 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 15:30:33,499 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 15:30:38,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:30:38,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:38,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:30:38,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:39,351 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 15:30:39,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 115 treesize of output 87 [2021-08-06 15:30:39,625 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 15:30:39,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997094963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:39,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:39,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:30:39,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105525997] [2021-08-06 15:30:39,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:30:39,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:30:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:30:39,626 INFO L87 Difference]: Start difference. First operand 1599 states and 5384 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 15:30:42,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:42,374 INFO L93 Difference]: Finished difference Result 3443 states and 10904 transitions. [2021-08-06 15:30:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:30:42,374 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 26 [2021-08-06 15:30:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:42,381 INFO L225 Difference]: With dead ends: 3443 [2021-08-06 15:30:42,381 INFO L226 Difference]: Without dead ends: 3407 [2021-08-06 15:30:42,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 2309.9ms TimeCoverageRelationStatistics Valid=490, Invalid=2266, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:30:42,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-08-06 15:30:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 1759. [2021-08-06 15:30:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 3.3924914675767917) internal successors, (5964), 1758 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 5964 transitions. [2021-08-06 15:30:42,413 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 5964 transitions. Word has length 26 [2021-08-06 15:30:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:42,413 INFO L470 AbstractCegarLoop]: Abstraction has 1759 states and 5964 transitions. [2021-08-06 15:30:42,413 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 15:30:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 5964 transitions. [2021-08-06 15:30:42,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:42,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:42,415 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:42,444 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 15:30:42,616 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 15:30:42,616 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:42,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1815084572, now seen corresponding path program 47 times [2021-08-06 15:30:42,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:42,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914907034] [2021-08-06 15:30:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:42,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:43,257 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 15:30:43,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:43,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914907034] [2021-08-06 15:30:43,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914907034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:43,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706904157] [2021-08-06 15:30:43,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:30:43,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:43,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:43,261 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 15:30:43,287 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 15:30:48,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:30:48,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:48,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:30:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:48,786 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 15:30:48,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 100 [2021-08-06 15:30:49,890 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 15:30:49,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706904157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:49,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:49,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:30:49,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306185147] [2021-08-06 15:30:49,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:30:49,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:30:49,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:30:49,891 INFO L87 Difference]: Start difference. First operand 1759 states and 5964 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 15:30:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:52,994 INFO L93 Difference]: Finished difference Result 3831 states and 12201 transitions. [2021-08-06 15:30:52,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:30:52,995 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 26 [2021-08-06 15:30:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:53,002 INFO L225 Difference]: With dead ends: 3831 [2021-08-06 15:30:53,002 INFO L226 Difference]: Without dead ends: 3774 [2021-08-06 15:30:53,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 2816.9ms TimeCoverageRelationStatistics Valid=625, Invalid=2567, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:30:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-08-06 15:30:53,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 1858. [2021-08-06 15:30:53,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.416262789445342) internal successors, (6344), 1857 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6344 transitions. [2021-08-06 15:30:53,038 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6344 transitions. Word has length 26 [2021-08-06 15:30:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:53,038 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6344 transitions. [2021-08-06 15:30:53,038 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 15:30:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6344 transitions. [2021-08-06 15:30:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:53,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:53,040 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:53,069 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 15:30:53,241 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 15:30:53,241 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash -629380028, now seen corresponding path program 30 times [2021-08-06 15:30:53,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:53,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460592556] [2021-08-06 15:30:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:53,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:54,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:54,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460592556] [2021-08-06 15:30:54,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460592556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:54,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115228212] [2021-08-06 15:30:54,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:30:54,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:54,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:54,131 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 15:30:54,131 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 15:30:58,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:30:58,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:58,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:30:58,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:00,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:31:00,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 96 [2021-08-06 15:31:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:02,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115228212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:02,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:02,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-06 15:31:02,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952391521] [2021-08-06 15:31:02,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:31:02,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:02,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:31:02,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:31:02,031 INFO L87 Difference]: Start difference. First operand 1858 states and 6344 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:04,575 INFO L93 Difference]: Finished difference Result 2493 states and 8287 transitions. [2021-08-06 15:31:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:31:04,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:31:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:04,580 INFO L225 Difference]: With dead ends: 2493 [2021-08-06 15:31:04,580 INFO L226 Difference]: Without dead ends: 2463 [2021-08-06 15:31:04,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 2316.3ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:31:04,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-08-06 15:31:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1870. [2021-08-06 15:31:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.41466024612092) internal successors, (6382), 1869 states have internal predecessors, (6382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6382 transitions. [2021-08-06 15:31:04,607 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6382 transitions. Word has length 26 [2021-08-06 15:31:04,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:04,607 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 6382 transitions. [2021-08-06 15:31:04,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6382 transitions. [2021-08-06 15:31:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:31:04,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:04,609 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:04,639 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 15:31:04,810 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 15:31:04,810 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:04,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:04,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2048054488, now seen corresponding path program 31 times [2021-08-06 15:31:04,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:04,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173128881] [2021-08-06 15:31:04,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:04,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:05,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:05,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173128881] [2021-08-06 15:31:05,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173128881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:05,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437707964] [2021-08-06 15:31:05,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:31:05,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:05,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:05,681 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 15:31:05,682 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 15:31:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:10,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:31:10,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:11,334 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:31:11,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 15:31:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:12,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437707964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:12,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:12,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:31:12,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309359011] [2021-08-06 15:31:12,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:31:12,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:12,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:31:12,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:31:12,731 INFO L87 Difference]: Start difference. First operand 1870 states and 6382 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:31:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:14,915 INFO L93 Difference]: Finished difference Result 2624 states and 8744 transitions. [2021-08-06 15:31:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:31:14,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:31:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:14,920 INFO L225 Difference]: With dead ends: 2624 [2021-08-06 15:31:14,920 INFO L226 Difference]: Without dead ends: 2605 [2021-08-06 15:31:14,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 2192.0ms TimeCoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:31:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-08-06 15:31:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1870. [2021-08-06 15:31:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.41466024612092) internal successors, (6382), 1869 states have internal predecessors, (6382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6382 transitions. [2021-08-06 15:31:14,949 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6382 transitions. Word has length 26 [2021-08-06 15:31:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:14,949 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 6382 transitions. [2021-08-06 15:31:14,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:31:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6382 transitions. [2021-08-06 15:31:14,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:31:14,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:14,952 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:14,981 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 15:31:15,152 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 15:31:15,153 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:15,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:15,153 INFO L82 PathProgramCache]: Analyzing trace with hash 358111584, now seen corresponding path program 32 times [2021-08-06 15:31:15,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:15,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956663787] [2021-08-06 15:31:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:15,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:15,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:15,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956663787] [2021-08-06 15:31:15,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956663787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:15,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984773077] [2021-08-06 15:31:15,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:31:15,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:15,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:15,709 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 15:31:15,736 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 15:31:20,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:31:20,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:20,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:31:20,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:21,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:31:21,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 87 [2021-08-06 15:31:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:24,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984773077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:24,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:24,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-06 15:31:24,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155033492] [2021-08-06 15:31:24,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:31:24,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:31:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:31:24,359 INFO L87 Difference]: Start difference. First operand 1870 states and 6382 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:26,938 INFO L93 Difference]: Finished difference Result 2612 states and 8652 transitions. [2021-08-06 15:31:26,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:31:26,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:31:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:26,944 INFO L225 Difference]: With dead ends: 2612 [2021-08-06 15:31:26,944 INFO L226 Difference]: Without dead ends: 2562 [2021-08-06 15:31:26,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2265.5ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:31:26,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-08-06 15:31:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1858. [2021-08-06 15:31:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.4141087775982766) internal successors, (6340), 1857 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6340 transitions. [2021-08-06 15:31:26,972 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6340 transitions. Word has length 26 [2021-08-06 15:31:26,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:26,972 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6340 transitions. [2021-08-06 15:31:26,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6340 transitions. [2021-08-06 15:31:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:31:26,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:26,975 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:27,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 15:31:27,176 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 15:31:27,176 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:27,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1039087114, now seen corresponding path program 48 times [2021-08-06 15:31:27,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:27,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643660677] [2021-08-06 15:31:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:27,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:28,163 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 15:31:28,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:28,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643660677] [2021-08-06 15:31:28,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643660677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:28,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847067314] [2021-08-06 15:31:28,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:31:28,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:28,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:28,164 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 15:31:28,165 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 15:31:33,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:31:33,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:33,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:33,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:31:34,698 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 15:31:34,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 84 [2021-08-06 15:31:34,882 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 15:31:34,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847067314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:34,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:34,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:31:34,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425625091] [2021-08-06 15:31:34,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:31:34,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:34,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:31:34,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:31:34,883 INFO L87 Difference]: Start difference. First operand 1858 states and 6340 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:36,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:36,892 INFO L93 Difference]: Finished difference Result 2345 states and 7778 transitions. [2021-08-06 15:31:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:31:36,893 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:31:36,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:36,897 INFO L225 Difference]: With dead ends: 2345 [2021-08-06 15:31:36,897 INFO L226 Difference]: Without dead ends: 2323 [2021-08-06 15:31:36,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2102.8ms TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:31:36,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-08-06 15:31:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1854. [2021-08-06 15:31:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 3.4128440366972477) internal successors, (6324), 1853 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 6324 transitions. [2021-08-06 15:31:36,924 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 6324 transitions. Word has length 26 [2021-08-06 15:31:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:36,924 INFO L470 AbstractCegarLoop]: Abstraction has 1854 states and 6324 transitions. [2021-08-06 15:31:36,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 6324 transitions. [2021-08-06 15:31:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:31:36,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:36,927 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:36,958 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 15:31:37,131 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 15:31:37,132 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash -113593248, now seen corresponding path program 49 times [2021-08-06 15:31:37,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:37,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980218844] [2021-08-06 15:31:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:37,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:37,811 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 15:31:37,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:37,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980218844] [2021-08-06 15:31:37,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980218844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:37,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358685310] [2021-08-06 15:31:37,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:31:37,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:37,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:37,812 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 15:31:37,813 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 15:31:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:43,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:43,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:44,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:31:44,062 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 15:31:44,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 128 treesize of output 84 [2021-08-06 15:31:44,312 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 15:31:44,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358685310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:44,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:44,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:31:44,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727173543] [2021-08-06 15:31:44,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:31:44,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:44,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:31:44,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:31:44,313 INFO L87 Difference]: Start difference. First operand 1854 states and 6324 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:47,001 INFO L93 Difference]: Finished difference Result 2540 states and 8417 transitions. [2021-08-06 15:31:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:31:47,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:31:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:47,006 INFO L225 Difference]: With dead ends: 2540 [2021-08-06 15:31:47,006 INFO L226 Difference]: Without dead ends: 2525 [2021-08-06 15:31:47,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2371.5ms TimeCoverageRelationStatistics Valid=534, Invalid=2222, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:31:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-08-06 15:31:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1854. [2021-08-06 15:31:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 3.4128440366972477) internal successors, (6324), 1853 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 6324 transitions. [2021-08-06 15:31:47,033 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 6324 transitions. Word has length 26 [2021-08-06 15:31:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:47,033 INFO L470 AbstractCegarLoop]: Abstraction has 1854 states and 6324 transitions. [2021-08-06 15:31:47,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 6324 transitions. [2021-08-06 15:31:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:31:47,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:47,036 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:47,067 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 15:31:47,236 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 15:31:47,237 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:47,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:47,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1291497788, now seen corresponding path program 50 times [2021-08-06 15:31:47,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:47,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501608175] [2021-08-06 15:31:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:47,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:47,911 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 15:31:47,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:47,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501608175] [2021-08-06 15:31:47,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501608175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:47,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883522160] [2021-08-06 15:31:47,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:31:47,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:47,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:47,913 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 15:31:47,913 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 15:31:53,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:31:53,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:53,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 15:31:53,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:54,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:31:54,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:31:54,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 106 [2021-08-06 15:31:55,722 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 15:31:55,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883522160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:55,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:55,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-06 15:31:55,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792712809] [2021-08-06 15:31:55,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:31:55,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:55,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:31:55,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:31:55,723 INFO L87 Difference]: Start difference. First operand 1854 states and 6324 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:03,972 INFO L93 Difference]: Finished difference Result 3419 states and 11025 transitions. [2021-08-06 15:32:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-06 15:32:03,972 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:32:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:03,977 INFO L225 Difference]: With dead ends: 3419 [2021-08-06 15:32:03,978 INFO L226 Difference]: Without dead ends: 3372 [2021-08-06 15:32:03,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 7349.7ms TimeCoverageRelationStatistics Valid=1246, Invalid=7310, Unknown=0, NotChecked=0, Total=8556 [2021-08-06 15:32:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2021-08-06 15:32:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 1926. [2021-08-06 15:32:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.410909090909091) internal successors, (6566), 1925 states have internal predecessors, (6566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 6566 transitions. [2021-08-06 15:32:04,011 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 6566 transitions. Word has length 26 [2021-08-06 15:32:04,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:04,011 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 6566 transitions. [2021-08-06 15:32:04,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:04,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 6566 transitions. [2021-08-06 15:32:04,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:04,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:04,014 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:04,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:04,215 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 15:32:04,215 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:04,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:04,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1457232352, now seen corresponding path program 51 times [2021-08-06 15:32:04,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:04,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484136401] [2021-08-06 15:32:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:04,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:05,081 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 15:32:05,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:05,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484136401] [2021-08-06 15:32:05,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484136401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:05,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171117170] [2021-08-06 15:32:05,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:32:05,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:05,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:05,082 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 15:32:05,083 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 15:32:10,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:32:10,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:10,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:32:10,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:11,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:32:11,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 112 treesize of output 118 [2021-08-06 15:32:17,104 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 15:32:17,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171117170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:17,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:17,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 15:32:17,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103191815] [2021-08-06 15:32:17,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:32:17,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:17,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:32:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:32:17,105 INFO L87 Difference]: Start difference. First operand 1926 states and 6566 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:22,971 INFO L93 Difference]: Finished difference Result 3265 states and 10593 transitions. [2021-08-06 15:32:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:32:22,972 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:32:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:22,977 INFO L225 Difference]: With dead ends: 3265 [2021-08-06 15:32:22,977 INFO L226 Difference]: Without dead ends: 3220 [2021-08-06 15:32:22,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 5661.1ms TimeCoverageRelationStatistics Valid=631, Invalid=2909, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:32:22,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-08-06 15:32:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1939. [2021-08-06 15:32:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.415892672858617) internal successors, (6620), 1938 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6620 transitions. [2021-08-06 15:32:23,009 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6620 transitions. Word has length 26 [2021-08-06 15:32:23,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:23,009 INFO L470 AbstractCegarLoop]: Abstraction has 1939 states and 6620 transitions. [2021-08-06 15:32:23,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6620 transitions. [2021-08-06 15:32:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:23,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:23,012 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:23,043 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 15:32:23,212 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 15:32:23,212 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:23,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:23,212 INFO L82 PathProgramCache]: Analyzing trace with hash -327621864, now seen corresponding path program 52 times [2021-08-06 15:32:23,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:23,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167833224] [2021-08-06 15:32:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:23,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:23,942 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 15:32:23,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:23,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167833224] [2021-08-06 15:32:23,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167833224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:23,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374660590] [2021-08-06 15:32:23,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:32:23,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:23,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:23,944 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 15:32:23,945 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 15:32:29,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:32:29,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:29,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:32:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:30,985 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:32:30,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 122 treesize of output 82 [2021-08-06 15:32:31,195 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 15:32:31,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374660590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:31,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:31,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:32:31,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564358620] [2021-08-06 15:32:31,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:32:31,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:31,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:32:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:32:31,196 INFO L87 Difference]: Start difference. First operand 1939 states and 6620 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:32:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:33,518 INFO L93 Difference]: Finished difference Result 2486 states and 8267 transitions. [2021-08-06 15:32:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:32:33,518 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:32:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:33,523 INFO L225 Difference]: With dead ends: 2486 [2021-08-06 15:32:33,523 INFO L226 Difference]: Without dead ends: 2471 [2021-08-06 15:32:33,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2162.3ms TimeCoverageRelationStatistics Valid=414, Invalid=1656, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:32:33,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-08-06 15:32:33,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1937. [2021-08-06 15:32:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.415805785123967) internal successors, (6613), 1936 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6613 transitions. [2021-08-06 15:32:33,547 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6613 transitions. Word has length 26 [2021-08-06 15:32:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:33,548 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 6613 transitions. [2021-08-06 15:32:33,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:32:33,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6613 transitions. [2021-08-06 15:32:33,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:33,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:33,550 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:33,583 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 15:32:33,752 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 15:32:33,753 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:33,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1371276116, now seen corresponding path program 53 times [2021-08-06 15:32:33,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:33,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986146353] [2021-08-06 15:32:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:33,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:34,340 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 15:32:34,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:34,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986146353] [2021-08-06 15:32:34,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986146353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:34,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062683009] [2021-08-06 15:32:34,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:32:34,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:34,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:34,341 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 15:32:34,342 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 15:32:40,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:32:40,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:40,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:32:40,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:41,117 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 15:32:41,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 122 treesize of output 102 [2021-08-06 15:32:42,066 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 15:32:42,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062683009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:42,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:42,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-06 15:32:42,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551248379] [2021-08-06 15:32:42,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:32:42,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:42,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:32:42,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:32:42,067 INFO L87 Difference]: Start difference. First operand 1937 states and 6613 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:45,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:45,204 INFO L93 Difference]: Finished difference Result 2799 states and 9264 transitions. [2021-08-06 15:32:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:32:45,205 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:32:45,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:45,209 INFO L225 Difference]: With dead ends: 2799 [2021-08-06 15:32:45,209 INFO L226 Difference]: Without dead ends: 2769 [2021-08-06 15:32:45,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2887.9ms TimeCoverageRelationStatistics Valid=544, Invalid=2536, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 15:32:45,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-08-06 15:32:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1942. [2021-08-06 15:32:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 3.4157650695517776) internal successors, (6630), 1941 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 6630 transitions. [2021-08-06 15:32:45,245 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 6630 transitions. Word has length 26 [2021-08-06 15:32:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:45,245 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 6630 transitions. [2021-08-06 15:32:45,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:45,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 6630 transitions. [2021-08-06 15:32:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:45,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:45,248 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:45,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 15:32:45,448 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 15:32:45,449 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:45,449 INFO L82 PathProgramCache]: Analyzing trace with hash -432990708, now seen corresponding path program 54 times [2021-08-06 15:32:45,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:45,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9270213] [2021-08-06 15:32:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:45,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:45,980 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 15:32:45,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:45,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9270213] [2021-08-06 15:32:45,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9270213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:45,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891285996] [2021-08-06 15:32:45,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:32:45,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:45,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:45,981 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 15:32:45,981 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 15:32:51,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:32:51,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:32:51,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:52,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:32:52,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:32:52,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:32:52,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 96 [2021-08-06 15:32:53,461 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 15:32:53,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891285996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:53,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:53,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-06 15:32:53,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030976098] [2021-08-06 15:32:53,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:32:53,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:32:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:32:53,462 INFO L87 Difference]: Start difference. First operand 1942 states and 6630 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:59,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:59,702 INFO L93 Difference]: Finished difference Result 3668 states and 11732 transitions. [2021-08-06 15:32:59,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 15:32:59,703 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:32:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:59,709 INFO L225 Difference]: With dead ends: 3668 [2021-08-06 15:32:59,709 INFO L226 Difference]: Without dead ends: 3611 [2021-08-06 15:32:59,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 5682.8ms TimeCoverageRelationStatistics Valid=1179, Invalid=4983, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 15:32:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-08-06 15:32:59,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 1980. [2021-08-06 15:32:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.413845376452754) internal successors, (6756), 1979 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6756 transitions. [2021-08-06 15:32:59,763 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6756 transitions. Word has length 26 [2021-08-06 15:32:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:59,764 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 6756 transitions. [2021-08-06 15:32:59,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6756 transitions. [2021-08-06 15:32:59,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:59,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:59,767 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:59,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 15:32:59,980 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 15:32:59,981 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:59,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:59,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1765328514, now seen corresponding path program 55 times [2021-08-06 15:32:59,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:59,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088015967] [2021-08-06 15:32:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:59,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:01,107 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 15:33:01,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:01,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088015967] [2021-08-06 15:33:01,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088015967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:01,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113007400] [2021-08-06 15:33:01,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:33:01,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:01,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:01,109 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 15:33:01,109 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 15:33:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:07,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:33:07,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:33:07,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:33:07,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:33:07,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 96 [2021-08-06 15:33:08,805 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 15:33:08,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113007400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:08,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:08,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:33:08,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342167098] [2021-08-06 15:33:08,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:33:08,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:08,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:33:08,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:33:08,806 INFO L87 Difference]: Start difference. First operand 1980 states and 6756 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:33:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:12,750 INFO L93 Difference]: Finished difference Result 3503 states and 11289 transitions. [2021-08-06 15:33:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:33:12,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:33:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:12,757 INFO L225 Difference]: With dead ends: 3503 [2021-08-06 15:33:12,757 INFO L226 Difference]: Without dead ends: 3469 [2021-08-06 15:33:12,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3705.6ms TimeCoverageRelationStatistics Valid=768, Invalid=2424, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:33:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-08-06 15:33:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 1989. [2021-08-06 15:33:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.42102615694165) internal successors, (6801), 1988 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6801 transitions. [2021-08-06 15:33:12,790 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6801 transitions. Word has length 26 [2021-08-06 15:33:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:12,790 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 6801 transitions. [2021-08-06 15:33:12,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:33:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6801 transitions. [2021-08-06 15:33:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:33:12,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:12,793 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:12,826 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 15:33:12,993 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 15:33:12,993 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1974199866, now seen corresponding path program 33 times [2021-08-06 15:33:12,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:12,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643542626] [2021-08-06 15:33:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:12,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:13,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:13,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643542626] [2021-08-06 15:33:13,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643542626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:13,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734244135] [2021-08-06 15:33:13,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:33:13,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:13,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:13,481 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 15:33:13,482 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 15:33:19,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:33:19,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:19,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:33:19,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:21,053 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:33:21,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 100 [2021-08-06 15:33:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:23,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734244135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:23,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:23,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 15:33:23,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8424750] [2021-08-06 15:33:23,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:33:23,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:23,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:33:23,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:33:23,468 INFO L87 Difference]: Start difference. First operand 1989 states and 6801 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:25,079 INFO L93 Difference]: Finished difference Result 2487 states and 8317 transitions. [2021-08-06 15:33:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:33:25,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:33:25,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:25,084 INFO L225 Difference]: With dead ends: 2487 [2021-08-06 15:33:25,084 INFO L226 Difference]: Without dead ends: 2472 [2021-08-06 15:33:25,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1640.0ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:33:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-08-06 15:33:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 1980. [2021-08-06 15:33:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.4183931278423447) internal successors, (6765), 1979 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6765 transitions. [2021-08-06 15:33:25,109 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6765 transitions. Word has length 26 [2021-08-06 15:33:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:25,109 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 6765 transitions. [2021-08-06 15:33:25,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6765 transitions. [2021-08-06 15:33:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:33:25,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:25,111 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:25,145 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 15:33:25,312 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 15:33:25,312 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash 622396936, now seen corresponding path program 34 times [2021-08-06 15:33:25,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:25,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531206630] [2021-08-06 15:33:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:25,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:25,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:25,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531206630] [2021-08-06 15:33:25,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531206630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:25,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002041865] [2021-08-06 15:33:25,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:33:25,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:25,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:25,736 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 15:33:25,736 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 15:33:31,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:33:31,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:31,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:33:31,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:33,063 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:33:33,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:33:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:33,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002041865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:33,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:33,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:33:33,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440340890] [2021-08-06 15:33:33,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:33:33,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:33,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:33:33,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:33:33,550 INFO L87 Difference]: Start difference. First operand 1980 states and 6765 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 15:33:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:35,135 INFO L93 Difference]: Finished difference Result 2953 states and 9723 transitions. [2021-08-06 15:33:35,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:33:35,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:33:35,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:35,140 INFO L225 Difference]: With dead ends: 2953 [2021-08-06 15:33:35,140 INFO L226 Difference]: Without dead ends: 2908 [2021-08-06 15:33:35,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1486.5ms TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:33:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-08-06 15:33:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2008. [2021-08-06 15:33:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.420029895366218) internal successors, (6864), 2007 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 6864 transitions. [2021-08-06 15:33:35,169 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 6864 transitions. Word has length 26 [2021-08-06 15:33:35,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:35,169 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 6864 transitions. [2021-08-06 15:33:35,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 15:33:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 6864 transitions. [2021-08-06 15:33:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:33:35,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:35,172 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:35,207 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 15:33:35,372 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 15:33:35,372 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:35,373 INFO L82 PathProgramCache]: Analyzing trace with hash -995135844, now seen corresponding path program 35 times [2021-08-06 15:33:35,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:35,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403164798] [2021-08-06 15:33:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:35,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:35,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:35,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403164798] [2021-08-06 15:33:35,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403164798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:35,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026350380] [2021-08-06 15:33:35,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:33:35,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:35,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:35,875 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 15:33:35,875 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 15:33:42,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:33:42,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:42,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:33:42,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:42,985 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:33:42,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 15:33:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:44,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026350380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:44,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:44,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:33:44,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569626086] [2021-08-06 15:33:44,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:33:44,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:44,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:33:44,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:33:44,179 INFO L87 Difference]: Start difference. First operand 2008 states and 6864 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:46,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:46,659 INFO L93 Difference]: Finished difference Result 3053 states and 10096 transitions. [2021-08-06 15:33:46,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:33:46,660 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:33:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:46,665 INFO L225 Difference]: With dead ends: 3053 [2021-08-06 15:33:46,665 INFO L226 Difference]: Without dead ends: 3023 [2021-08-06 15:33:46,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2185.1ms TimeCoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:33:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3023 states. [2021-08-06 15:33:46,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3023 to 1997. [2021-08-06 15:33:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 3.417835671342685) internal successors, (6822), 1996 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 6822 transitions. [2021-08-06 15:33:46,703 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 6822 transitions. Word has length 26 [2021-08-06 15:33:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:46,704 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 6822 transitions. [2021-08-06 15:33:46,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 6822 transitions. [2021-08-06 15:33:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:33:46,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:46,708 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:46,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:46,920 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 15:33:46,921 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1478016736, now seen corresponding path program 36 times [2021-08-06 15:33:46,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:46,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191675234] [2021-08-06 15:33:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:46,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:47,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:47,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191675234] [2021-08-06 15:33:47,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191675234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:47,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956348957] [2021-08-06 15:33:47,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:33:47,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:47,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:47,399 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 15:33:47,400 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 15:33:53,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:33:53,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:33:53,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:55,582 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:33:55,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 100 [2021-08-06 15:33:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:57,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956348957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:57,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:57,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:33:57,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779159797] [2021-08-06 15:33:57,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:33:57,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:57,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:33:57,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:33:57,709 INFO L87 Difference]: Start difference. First operand 1997 states and 6822 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:00,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:00,351 INFO L93 Difference]: Finished difference Result 2695 states and 8846 transitions. [2021-08-06 15:34:00,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:34:00,352 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:34:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:00,356 INFO L225 Difference]: With dead ends: 2695 [2021-08-06 15:34:00,356 INFO L226 Difference]: Without dead ends: 2655 [2021-08-06 15:34:00,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2318.3ms TimeCoverageRelationStatistics Valid=300, Invalid=1680, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:34:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-08-06 15:34:00,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 1991. [2021-08-06 15:34:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.4175879396984925) internal successors, (6801), 1990 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 6801 transitions. [2021-08-06 15:34:00,384 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 6801 transitions. Word has length 26 [2021-08-06 15:34:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:00,384 INFO L470 AbstractCegarLoop]: Abstraction has 1991 states and 6801 transitions. [2021-08-06 15:34:00,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 6801 transitions. [2021-08-06 15:34:00,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:34:00,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:00,387 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:00,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:00,587 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 15:34:00,587 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:00,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:00,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1665793854, now seen corresponding path program 37 times [2021-08-06 15:34:00,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:00,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444840078] [2021-08-06 15:34:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:00,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:01,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:01,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444840078] [2021-08-06 15:34:01,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444840078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:01,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807494187] [2021-08-06 15:34:01,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:01,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:01,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:01,069 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 15:34:01,070 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 15:34:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:34:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:08,316 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:34:08,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 15:34:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:09,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807494187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:09,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:09,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:34:09,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946510319] [2021-08-06 15:34:09,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:34:09,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:09,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:34:09,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:34:09,425 INFO L87 Difference]: Start difference. First operand 1991 states and 6801 transitions. Second operand has 16 states, 16 states have (on average 2.6875) 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 15:34:10,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:10,054 INFO L93 Difference]: Finished difference Result 2496 states and 8305 transitions. [2021-08-06 15:34:10,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:34:10,054 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) 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 26 [2021-08-06 15:34:10,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:10,058 INFO L225 Difference]: With dead ends: 2496 [2021-08-06 15:34:10,058 INFO L226 Difference]: Without dead ends: 2471 [2021-08-06 15:34:10,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 732.2ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:34:10,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-08-06 15:34:10,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1985. [2021-08-06 15:34:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 3.4128024193548385) internal successors, (6771), 1984 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 6771 transitions. [2021-08-06 15:34:10,083 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 6771 transitions. Word has length 26 [2021-08-06 15:34:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:10,083 INFO L470 AbstractCegarLoop]: Abstraction has 1985 states and 6771 transitions. [2021-08-06 15:34:10,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) 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 15:34:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 6771 transitions. [2021-08-06 15:34:10,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:34:10,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:10,086 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:10,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 15:34:10,286 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 15:34:10,287 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:10,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:10,287 INFO L82 PathProgramCache]: Analyzing trace with hash 800240156, now seen corresponding path program 38 times [2021-08-06 15:34:10,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:10,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919467394] [2021-08-06 15:34:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:10,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:10,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:10,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919467394] [2021-08-06 15:34:10,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919467394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:10,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493800310] [2021-08-06 15:34:10,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:10,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:10,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:10,662 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 15:34:10,663 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 15:34:17,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:17,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:17,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:34:17,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:18,167 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:34:18,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:34:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:18,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493800310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:18,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:18,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 15:34:18,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048468981] [2021-08-06 15:34:18,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:18,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:18,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:18,725 INFO L87 Difference]: Start difference. First operand 1985 states and 6771 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:18,983 INFO L93 Difference]: Finished difference Result 2063 states and 6945 transitions. [2021-08-06 15:34:18,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:34:18,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:34:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:18,987 INFO L225 Difference]: With dead ends: 2063 [2021-08-06 15:34:18,987 INFO L226 Difference]: Without dead ends: 2044 [2021-08-06 15:34:18,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 390.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:34:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-08-06 15:34:19,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1977. [2021-08-06 15:34:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 3.4114372469635628) internal successors, (6741), 1976 states have internal predecessors, (6741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 6741 transitions. [2021-08-06 15:34:19,010 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 6741 transitions. Word has length 26 [2021-08-06 15:34:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:19,010 INFO L470 AbstractCegarLoop]: Abstraction has 1977 states and 6741 transitions. [2021-08-06 15:34:19,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 6741 transitions. [2021-08-06 15:34:19,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:34:19,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:19,012 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:19,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:19,213 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 15:34:19,213 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:19,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1347052380, now seen corresponding path program 39 times [2021-08-06 15:34:19,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:19,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963375790] [2021-08-06 15:34:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:19,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:19,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:19,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963375790] [2021-08-06 15:34:19,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963375790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:19,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942832594] [2021-08-06 15:34:19,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:19,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:19,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:19,595 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 15:34:19,595 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 15:34:26,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:34:26,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:26,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:34:26,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:27,152 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:34:27,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 91 [2021-08-06 15:34:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:29,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942832594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:29,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:29,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 15:34:29,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374725571] [2021-08-06 15:34:29,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:34:29,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:29,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:34:29,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:34:29,147 INFO L87 Difference]: Start difference. First operand 1977 states and 6741 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:30,020 INFO L93 Difference]: Finished difference Result 2213 states and 7424 transitions. [2021-08-06 15:34:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:34:30,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:34:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:30,024 INFO L225 Difference]: With dead ends: 2213 [2021-08-06 15:34:30,024 INFO L226 Difference]: Without dead ends: 2188 [2021-08-06 15:34:30,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 971.6ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:34:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-08-06 15:34:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1953. [2021-08-06 15:34:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.4149590163934427) internal successors, (6666), 1952 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 6666 transitions. [2021-08-06 15:34:30,048 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 6666 transitions. Word has length 26 [2021-08-06 15:34:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:30,048 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 6666 transitions. [2021-08-06 15:34:30,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 6666 transitions. [2021-08-06 15:34:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:34:30,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:30,050 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:30,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:30,251 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 15:34:30,251 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash 796347224, now seen corresponding path program 40 times [2021-08-06 15:34:30,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:30,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767516091] [2021-08-06 15:34:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:30,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:30,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:30,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767516091] [2021-08-06 15:34:30,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767516091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:30,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599383210] [2021-08-06 15:34:30,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:30,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:30,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:30,764 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 15:34:30,764 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 15:34:37,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:37,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:37,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:34:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:38,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:34:38,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:34:38,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:34:38,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 100 [2021-08-06 15:34:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:39,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599383210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:39,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:39,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:34:39,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905630695] [2021-08-06 15:34:39,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:34:39,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:34:39,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:34:39,536 INFO L87 Difference]: Start difference. First operand 1953 states and 6666 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:41,360 INFO L93 Difference]: Finished difference Result 2805 states and 9326 transitions. [2021-08-06 15:34:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:34:41,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:34:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:41,365 INFO L225 Difference]: With dead ends: 2805 [2021-08-06 15:34:41,365 INFO L226 Difference]: Without dead ends: 2786 [2021-08-06 15:34:41,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1831.7ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:34:41,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-08-06 15:34:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1937. [2021-08-06 15:34:41,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.414772727272727) internal successors, (6611), 1936 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6611 transitions. [2021-08-06 15:34:41,400 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6611 transitions. Word has length 26 [2021-08-06 15:34:41,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:41,400 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 6611 transitions. [2021-08-06 15:34:41,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:41,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6611 transitions. [2021-08-06 15:34:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:34:41,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:41,402 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:41,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 15:34:41,603 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 15:34:41,603 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:41,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1836189860, now seen corresponding path program 41 times [2021-08-06 15:34:41,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:41,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078799177] [2021-08-06 15:34:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:41,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:42,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:42,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078799177] [2021-08-06 15:34:42,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078799177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:42,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604694241] [2021-08-06 15:34:42,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:42,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:42,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:42,061 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 15:34:42,062 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 15:34:49,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:34:49,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:49,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:34:49,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:50,223 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:34:50,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:34:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:50,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604694241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:50,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:50,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:34:50,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168988852] [2021-08-06 15:34:50,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:34:50,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:50,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:34:50,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:34:50,616 INFO L87 Difference]: Start difference. First operand 1937 states and 6611 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:51,418 INFO L93 Difference]: Finished difference Result 2479 states and 8292 transitions. [2021-08-06 15:34:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:34:51,419 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:34:51,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:51,423 INFO L225 Difference]: With dead ends: 2479 [2021-08-06 15:34:51,423 INFO L226 Difference]: Without dead ends: 2464 [2021-08-06 15:34:51,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 961.1ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:34:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2021-08-06 15:34:51,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 1982. [2021-08-06 15:34:51,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.409893992932862) internal successors, (6755), 1981 states have internal predecessors, (6755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 6755 transitions. [2021-08-06 15:34:51,448 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 6755 transitions. Word has length 26 [2021-08-06 15:34:51,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:51,448 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 6755 transitions. [2021-08-06 15:34:51,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:51,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 6755 transitions. [2021-08-06 15:34:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:34:51,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:51,450 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:51,485 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 15:34:51,650 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 15:34:51,651 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2003998952, now seen corresponding path program 42 times [2021-08-06 15:34:51,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:51,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847504751] [2021-08-06 15:34:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:51,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:52,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:52,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847504751] [2021-08-06 15:34:52,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847504751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:52,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523618749] [2021-08-06 15:34:52,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:52,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:52,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:52,224 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 15:34:52,224 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 15:34:59,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:34:59,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:59,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:34:59,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:00,448 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:35:00,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 100 [2021-08-06 15:35:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:03,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523618749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:03,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:03,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:35:03,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063204174] [2021-08-06 15:35:03,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:35:03,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:03,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:35:03,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:35:03,968 INFO L87 Difference]: Start difference. First operand 1982 states and 6755 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:06,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:06,369 INFO L93 Difference]: Finished difference Result 2838 states and 9371 transitions. [2021-08-06 15:35:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:35:06,370 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:35:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:06,375 INFO L225 Difference]: With dead ends: 2838 [2021-08-06 15:35:06,375 INFO L226 Difference]: Without dead ends: 2808 [2021-08-06 15:35:06,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2342.3ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:35:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-08-06 15:35:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 1983. [2021-08-06 15:35:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.4112008072653883) internal successors, (6761), 1982 states have internal predecessors, (6761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 6761 transitions. [2021-08-06 15:35:06,404 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 6761 transitions. Word has length 26 [2021-08-06 15:35:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:06,404 INFO L470 AbstractCegarLoop]: Abstraction has 1983 states and 6761 transitions. [2021-08-06 15:35:06,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 6761 transitions. [2021-08-06 15:35:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:35:06,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:06,407 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:06,443 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 15:35:06,607 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 15:35:06,607 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:06,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:06,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1705225504, now seen corresponding path program 43 times [2021-08-06 15:35:06,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:06,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207403159] [2021-08-06 15:35:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:06,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:07,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:07,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207403159] [2021-08-06 15:35:07,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207403159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:07,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24183997] [2021-08-06 15:35:07,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:35:07,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:07,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:07,109 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 15:35:07,109 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 15:35:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:14,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:35:14,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:15,175 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:35:15,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 70 [2021-08-06 15:35:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:15,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24183997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:15,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:15,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:35:15,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722694371] [2021-08-06 15:35:15,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:35:15,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:15,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:35:15,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:35:15,795 INFO L87 Difference]: Start difference. First operand 1983 states and 6761 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:16,551 INFO L93 Difference]: Finished difference Result 2585 states and 8607 transitions. [2021-08-06 15:35:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:35:16,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:35:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:16,556 INFO L225 Difference]: With dead ends: 2585 [2021-08-06 15:35:16,556 INFO L226 Difference]: Without dead ends: 2555 [2021-08-06 15:35:16,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 864.0ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:35:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-08-06 15:35:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1986. [2021-08-06 15:35:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.4141057934508816) internal successors, (6777), 1985 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6777 transitions. [2021-08-06 15:35:16,584 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6777 transitions. Word has length 26 [2021-08-06 15:35:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:16,584 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 6777 transitions. [2021-08-06 15:35:16,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6777 transitions. [2021-08-06 15:35:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:35:16,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:16,587 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:16,625 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 15:35:16,787 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 15:35:16,787 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:16,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:16,787 INFO L82 PathProgramCache]: Analyzing trace with hash 639330528, now seen corresponding path program 44 times [2021-08-06 15:35:16,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:16,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423869194] [2021-08-06 15:35:16,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:16,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:17,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:17,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423869194] [2021-08-06 15:35:17,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423869194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:17,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046557289] [2021-08-06 15:35:17,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:35:17,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:17,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:17,214 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 15:35:17,214 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 15:35:24,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:24,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:24,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:35:24,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:25,352 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:35:25,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 94 [2021-08-06 15:35:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:27,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046557289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:27,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:27,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 15:35:27,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457848261] [2021-08-06 15:35:27,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:35:27,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:27,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:35:27,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:35:27,435 INFO L87 Difference]: Start difference. First operand 1986 states and 6777 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 15:35:28,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:28,100 INFO L93 Difference]: Finished difference Result 2549 states and 8549 transitions. [2021-08-06 15:35:28,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:35:28,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 15:35:28,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:28,104 INFO L225 Difference]: With dead ends: 2549 [2021-08-06 15:35:28,105 INFO L226 Difference]: Without dead ends: 2534 [2021-08-06 15:35:28,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 805.0ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:35:28,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-08-06 15:35:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2004. [2021-08-06 15:35:28,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.4103844233649525) internal successors, (6831), 2003 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:28,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6831 transitions. [2021-08-06 15:35:28,132 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6831 transitions. Word has length 26 [2021-08-06 15:35:28,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:28,132 INFO L470 AbstractCegarLoop]: Abstraction has 2004 states and 6831 transitions. [2021-08-06 15:35:28,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 15:35:28,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6831 transitions. [2021-08-06 15:35:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:35:28,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:28,135 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:28,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 15:35:28,335 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 15:35:28,336 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:28,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1438671812, now seen corresponding path program 45 times [2021-08-06 15:35:28,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:28,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390368855] [2021-08-06 15:35:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:28,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:28,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:28,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390368855] [2021-08-06 15:35:28,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390368855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:28,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395784286] [2021-08-06 15:35:28,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:35:28,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:28,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:28,764 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 15:35:28,765 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 15:35:36,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:35:36,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:36,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:35:36,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:39,488 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 15:35:39,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 82 [2021-08-06 15:35:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:40,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395784286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:40,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:40,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:35:40,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030667920] [2021-08-06 15:35:40,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:35:40,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:40,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:35:40,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:35:40,010 INFO L87 Difference]: Start difference. First operand 2004 states and 6831 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 15:35:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:40,701 INFO L93 Difference]: Finished difference Result 2495 states and 8370 transitions. [2021-08-06 15:35:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:35:40,701 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 15:35:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:40,705 INFO L225 Difference]: With dead ends: 2495 [2021-08-06 15:35:40,705 INFO L226 Difference]: Without dead ends: 2480 [2021-08-06 15:35:40,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 752.3ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:35:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-08-06 15:35:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2025. [2021-08-06 15:35:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.4071146245059287) internal successors, (6896), 2024 states have internal predecessors, (6896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 6896 transitions. [2021-08-06 15:35:40,738 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 6896 transitions. Word has length 26 [2021-08-06 15:35:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:40,738 INFO L470 AbstractCegarLoop]: Abstraction has 2025 states and 6896 transitions. [2021-08-06 15:35:40,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 15:35:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 6896 transitions. [2021-08-06 15:35:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:35:40,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:40,742 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:40,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 15:35:40,942 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 15:35:40,942 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:40,943 INFO L82 PathProgramCache]: Analyzing trace with hash -178860968, now seen corresponding path program 46 times [2021-08-06 15:35:40,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:40,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668989540] [2021-08-06 15:35:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:40,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:41,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:41,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668989540] [2021-08-06 15:35:41,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668989540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:41,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306641298] [2021-08-06 15:35:41,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:35:41,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:41,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:41,462 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 15:35:41,462 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 15:35:48,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:35:48,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:48,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:35:48,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:49,686 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:35:49,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 15:35:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:51,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306641298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:51,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:51,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:35:51,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517747038] [2021-08-06 15:35:51,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:35:51,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:51,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:35:51,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:35:51,040 INFO L87 Difference]: Start difference. First operand 2025 states and 6896 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 15:35:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:52,111 INFO L93 Difference]: Finished difference Result 2898 states and 9584 transitions. [2021-08-06 15:35:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:35:52,111 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 15:35:52,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:52,117 INFO L225 Difference]: With dead ends: 2898 [2021-08-06 15:35:52,117 INFO L226 Difference]: Without dead ends: 2868 [2021-08-06 15:35:52,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1164.5ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:35:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-08-06 15:35:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2035. [2021-08-06 15:35:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 2034 states have (on average 3.411504424778761) internal successors, (6939), 2034 states have internal predecessors, (6939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 6939 transitions. [2021-08-06 15:35:52,151 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 6939 transitions. Word has length 26 [2021-08-06 15:35:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:52,152 INFO L470 AbstractCegarLoop]: Abstraction has 2035 states and 6939 transitions. [2021-08-06 15:35:52,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 15:35:52,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 6939 transitions. [2021-08-06 15:35:52,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:35:52,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:52,155 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:52,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:52,357 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 15:35:52,357 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:52,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1868803872, now seen corresponding path program 47 times [2021-08-06 15:35:52,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:52,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882046931] [2021-08-06 15:35:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:52,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:53,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:53,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882046931] [2021-08-06 15:35:53,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882046931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:53,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059718582] [2021-08-06 15:35:53,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:53,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:53,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:53,064 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 15:35:53,067 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 15:36:00,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:36:00,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:00,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:36:00,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:01,349 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:36:01,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 77 [2021-08-06 15:36:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:02,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059718582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:02,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:02,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 15:36:02,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633115907] [2021-08-06 15:36:02,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:36:02,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:02,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:36:02,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:36:02,793 INFO L87 Difference]: Start difference. First operand 2035 states and 6939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:03,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:03,521 INFO L93 Difference]: Finished difference Result 2645 states and 8842 transitions. [2021-08-06 15:36:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:36:03,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:36:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:03,525 INFO L225 Difference]: With dead ends: 2645 [2021-08-06 15:36:03,525 INFO L226 Difference]: Without dead ends: 2620 [2021-08-06 15:36:03,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 937.3ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:36:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2021-08-06 15:36:03,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 2039. [2021-08-06 15:36:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 3.4116781157998037) internal successors, (6953), 2038 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 6953 transitions. [2021-08-06 15:36:03,552 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 6953 transitions. Word has length 26 [2021-08-06 15:36:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:03,552 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 6953 transitions. [2021-08-06 15:36:03,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 6953 transitions. [2021-08-06 15:36:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:36:03,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:03,555 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:03,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:03,755 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 15:36:03,755 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:03,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:03,755 INFO L82 PathProgramCache]: Analyzing trace with hash 615736860, now seen corresponding path program 48 times [2021-08-06 15:36:03,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:03,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760617821] [2021-08-06 15:36:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:03,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:04,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:04,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760617821] [2021-08-06 15:36:04,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760617821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:04,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175426328] [2021-08-06 15:36:04,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:36:04,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:04,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:04,259 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 15:36:04,260 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 15:36:12,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:36:12,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:12,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:36:12,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:12,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:12,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:36:12,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2021-08-06 15:36:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:13,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175426328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:13,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:13,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:36:13,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125691814] [2021-08-06 15:36:13,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:36:13,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:13,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:36:13,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:36:13,918 INFO L87 Difference]: Start difference. First operand 2039 states and 6953 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:14,724 INFO L93 Difference]: Finished difference Result 2584 states and 8673 transitions. [2021-08-06 15:36:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:36:14,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:36:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:14,728 INFO L225 Difference]: With dead ends: 2584 [2021-08-06 15:36:14,728 INFO L226 Difference]: Without dead ends: 2569 [2021-08-06 15:36:14,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 894.6ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:36:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-08-06 15:36:14,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2039. [2021-08-06 15:36:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 3.4116781157998037) internal successors, (6953), 2038 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 6953 transitions. [2021-08-06 15:36:14,755 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 6953 transitions. Word has length 26 [2021-08-06 15:36:14,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:14,755 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 6953 transitions. [2021-08-06 15:36:14,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:14,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 6953 transitions. [2021-08-06 15:36:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:36:14,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:14,758 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:14,796 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 15:36:14,958 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 15:36:14,958 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:14,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:14,959 INFO L82 PathProgramCache]: Analyzing trace with hash 281045340, now seen corresponding path program 56 times [2021-08-06 15:36:14,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:14,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738673807] [2021-08-06 15:36:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:14,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:15,529 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 15:36:15,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:15,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738673807] [2021-08-06 15:36:15,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738673807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:15,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632229989] [2021-08-06 15:36:15,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:36:15,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:15,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:15,530 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 15:36:15,531 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 15:36:23,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:36:23,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:23,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:36:23,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:24,445 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:36:24,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-06 15:36:24,613 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 15:36:24,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632229989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:24,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:24,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:36:24,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107771475] [2021-08-06 15:36:24,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:36:24,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:24,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:36:24,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:36:24,614 INFO L87 Difference]: Start difference. First operand 2039 states and 6953 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 15:36:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:25,367 INFO L93 Difference]: Finished difference Result 2576 states and 8339 transitions. [2021-08-06 15:36:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:36:25,368 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 15:36:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:25,372 INFO L225 Difference]: With dead ends: 2576 [2021-08-06 15:36:25,372 INFO L226 Difference]: Without dead ends: 2539 [2021-08-06 15:36:25,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 803.0ms TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:36:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-08-06 15:36:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2061. [2021-08-06 15:36:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.4106796116504854) internal successors, (7026), 2060 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7026 transitions. [2021-08-06 15:36:25,400 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7026 transitions. Word has length 26 [2021-08-06 15:36:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:25,400 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 7026 transitions. [2021-08-06 15:36:25,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 15:36:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7026 transitions. [2021-08-06 15:36:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:36:25,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:25,403 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:25,441 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 15:36:25,603 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 15:36:25,604 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:25,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1348919904, now seen corresponding path program 57 times [2021-08-06 15:36:25,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:25,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130616210] [2021-08-06 15:36:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:25,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:26,180 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 15:36:26,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:26,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130616210] [2021-08-06 15:36:26,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130616210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:26,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586634457] [2021-08-06 15:36:26,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:36:26,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:26,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:26,181 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 15:36:26,182 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 15:36:34,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:36:34,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:34,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:36:34,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:34,947 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:36:34,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 103 [2021-08-06 15:36:36,162 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 15:36:36,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586634457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:36,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:36,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:36:36,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719700022] [2021-08-06 15:36:36,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:36:36,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:36,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:36:36,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:36:36,163 INFO L87 Difference]: Start difference. First operand 2061 states and 7026 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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) Received shutdown request... [2021-08-06 15:36:37,089 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:36:37,089 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 15:36:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:36:37,093 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:36:37,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:37,295 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 15:36:37,295 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (2061states) and FLOYD_HOARE automaton (currently 17 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (150 states constructed, input type IntersectNwa). [2021-08-06 15:36:37,297 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:36:37,297 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:36:37,297 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 15:36:37,300 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:36:37,300 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:36:37,301 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:36:37 BasicIcfg [2021-08-06 15:36:37,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:36:37,302 INFO L168 Benchmark]: Toolchain (without parser) took 698332.70 ms. Allocated memory was 188.7 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 169.7 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 421.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:36:37,302 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 188.7 MB. Free memory is still 170.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:36:37,302 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.53 ms. Allocated memory is still 188.7 MB. Free memory was 169.6 MB in the beginning and 168.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:36:37,302 INFO L168 Benchmark]: Boogie Preprocessor took 25.85 ms. Allocated memory is still 188.7 MB. Free memory was 168.1 MB in the beginning and 167.2 MB in the end (delta: 912.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:36:37,302 INFO L168 Benchmark]: RCFGBuilder took 251.23 ms. Allocated memory is still 188.7 MB. Free memory was 167.2 MB in the beginning and 154.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-06 15:36:37,302 INFO L168 Benchmark]: TraceAbstraction took 698021.65 ms. Allocated memory was 188.7 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 153.6 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 405.4 MB. Max. memory is 8.0 GB. [2021-08-06 15:36:37,303 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 188.7 MB. Free memory is still 170.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.53 ms. Allocated memory is still 188.7 MB. Free memory was 169.6 MB in the beginning and 168.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.85 ms. Allocated memory is still 188.7 MB. Free memory was 168.1 MB in the beginning and 167.2 MB in the end (delta: 912.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 251.23 ms. Allocated memory is still 188.7 MB. Free memory was 167.2 MB in the beginning and 154.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 698021.65 ms. Allocated memory was 188.7 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 153.6 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 405.4 MB. 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: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (2061states) and FLOYD_HOARE automaton (currently 17 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (150 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (2061states) and FLOYD_HOARE automaton (currently 17 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (150 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (2061states) and FLOYD_HOARE automaton (currently 17 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (150 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (2061states) and FLOYD_HOARE automaton (currently 17 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (150 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 697947.5ms, OverallIterations: 108, TraceHistogramMax: 2, EmptinessCheckTime: 244.8ms, AutomataDifference: 161667.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4490 SDtfs, 21013 SDslu, 33142 SDs, 0 SdLazy, 61582 SolverSat, 3658 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34590.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5694 GetRequests, 1980 SyntacticMatches, 94 SemanticMatches, 3620 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43291 ImplicationChecksByTransitivity, 151075.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2061occurred in iteration=107, InterpolantAutomatonStates: 2780, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2547.3ms AutomataMinimizationTime, 107 MinimizatonAttempts, 78281 StatesRemovedByMinimization, 107 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 374.5ms SsaConstructionTime, 1918.8ms SatisfiabilityAnalysisTime, 201647.8ms InterpolantComputationTime, 5350 NumberOfCodeBlocks, 5350 NumberOfCodeBlocksAsserted, 341 NumberOfCheckSat, 5137 ConstructedInterpolants, 95 QuantifiedInterpolants, 145223 SizeOfPredicates, 621 NumberOfNonLiveVariables, 6930 ConjunctsInSsa, 2167 ConjunctsInUnsatCore, 213 InterpolantComputations, 3 PerfectInterpolantSequences, 107/1238 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