/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-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-10 03:43:15,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 03:43:15,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 03:43:15,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-10 03:43:15,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-10 03:43:15,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-10 03:43:15,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-10 03:43:15,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-10 03:43:15,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-10 03:43:15,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-10 03:43:15,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-10 03:43:15,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-10 03:43:15,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-10 03:43:15,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-10 03:43:15,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-10 03:43:15,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-10 03:43:15,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-10 03:43:15,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-10 03:43:15,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-10 03:43:15,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-10 03:43:15,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-10 03:43:15,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-10 03:43:15,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-10 03:43:15,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-10 03:43:15,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-10 03:43:15,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-10 03:43:15,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-10 03:43:15,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-10 03:43:15,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-10 03:43:15,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-10 03:43:15,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-10 03:43:15,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-10 03:43:15,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-10 03:43:15,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-10 03:43:15,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-10 03:43:15,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-10 03:43:15,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-10 03:43:15,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-10 03:43:15,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-10 03:43:15,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-10 03:43:15,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-10 03:43:15,430 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-MCRwithDepranks-BasicCegarLoop.epf [2022-02-10 03:43:15,448 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 03:43:15,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 03:43:15,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 03:43:15,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 03:43:15,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 03:43:15,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 03:43:15,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 03:43:15,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 03:43:15,450 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 03:43:15,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 03:43:15,450 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 03:43:15,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 03:43:15,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 03:43:15,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 03:43:15,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 03:43:15,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 03:43:15,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 03:43:15,451 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 03:43:15,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 03:43:15,451 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 03:43:15,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 03:43:15,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 03:43:15,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 03:43:15,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 03:43:15,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 03:43:15,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:43:15,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 03:43:15,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 03:43:15,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 03:43:15,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 03:43:15,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 03:43:15,452 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 03:43:15,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 03:43:15,453 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-10 03:43:15,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 03:43:15,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 03:43:15,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 03:43:15,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 03:43:15,655 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 03:43:15,657 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 03:43:15,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl [2022-02-10 03:43:15,658 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl' [2022-02-10 03:43:15,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 03:43:15,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 03:43:15,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 03:43:15,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 03:43:15,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 03:43:15,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:43:15" (1/1) ... [2022-02-10 03:43:15,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:43:15" (1/1) ... [2022-02-10 03:43:15,696 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 03:43:15,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 03:43:15,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 03:43:15,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 03:43:15,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 03:43:15,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:43:15" (1/1) ... [2022-02-10 03:43:15,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:43:15" (1/1) ... [2022-02-10 03:43:15,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:43:15" (1/1) ... [2022-02-10 03:43:15,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:43:15" (1/1) ... [2022-02-10 03:43:15,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:43:15" (1/1) ... [2022-02-10 03:43:15,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:43:15" (1/1) ... [2022-02-10 03:43:15,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:43:15" (1/1) ... [2022-02-10 03:43:15,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 03:43:15,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 03:43:15,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 03:43:15,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 03:43:15,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:43:15" (1/1) ... [2022-02-10 03:43:15,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:43:15,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:15,735 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-10 03:43:15,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-10 03:43:15,775 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-10 03:43:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-10 03:43:15,775 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-10 03:43:15,775 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-10 03:43:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-10 03:43:15,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-10 03:43:15,776 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 03:43:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 03:43:15,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 03:43:15,776 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-10 03:43:15,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-10 03:43:15,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-10 03:43:15,777 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-10 03:43:15,813 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 03:43:15,814 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 03:43:15,918 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 03:43:15,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 03:43:15,928 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-10 03:43:15,930 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:43:15 BoogieIcfgContainer [2022-02-10 03:43:15,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 03:43:15,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 03:43:15,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 03:43:15,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 03:43:15,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:43:15" (1/2) ... [2022-02-10 03:43:15,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e70a183 and model type min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 03:43:15, skipping insertion in model container [2022-02-10 03:43:15,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:43:15" (2/2) ... [2022-02-10 03:43:15,950 INFO L111 eAbstractionObserver]: Analyzing ICFG min-array-hom.wvr.bpl [2022-02-10 03:43:15,953 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 03:43:15,954 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 03:43:15,954 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 03:43:15,954 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 03:43:15,988 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-10 03:43:16,030 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 03:43:16,035 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-10 03:43:16,035 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-10 03:43:16,058 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-02-10 03:43:16,084 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) [2022-02-10 03:43:21,702 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 526838 transitions and produced 183322 states. [2022-02-10 03:43:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 183322 states, 122589 states have (on average 2.0976759741901803) internal successors, (257152), 183321 states have internal predecessors, (257152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:43:23,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:23,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:23,062 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:23,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:23,066 INFO L85 PathProgramCache]: Analyzing trace with hash -234537446, now seen corresponding path program 1 times [2022-02-10 03:43:23,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:23,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22053287] [2022-02-10 03:43:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:23,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:23,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:23,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22053287] [2022-02-10 03:43:23,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22053287] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:43:23,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:43:23,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 03:43:23,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535335994] [2022-02-10 03:43:23,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:43:23,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 03:43:23,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:23,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 03:43:23,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:43:23,962 INFO L87 Difference]: Start difference. First operand has 183322 states, 122589 states have (on average 2.0976759741901803) internal successors, (257152), 183321 states have internal predecessors, (257152), 0 states have call successors, (0), 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) [2022-02-10 03:43:27,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:27,300 INFO L93 Difference]: Finished difference Result 183318 states and 257148 transitions. [2022-02-10 03:43:27,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 03:43:27,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-10 03:43:27,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:27,901 INFO L225 Difference]: With dead ends: 183318 [2022-02-10 03:43:27,901 INFO L226 Difference]: Without dead ends: 56655 [2022-02-10 03:43:27,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:43:27,908 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:27,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:43:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56655 states. [2022-02-10 03:43:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56655 to 123. [2022-02-10 03:43:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 122 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 245 transitions. [2022-02-10 03:43:28,416 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 245 transitions. Word has length 18 [2022-02-10 03:43:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:28,416 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 245 transitions. [2022-02-10 03:43:28,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 245 transitions. [2022-02-10 03:43:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-10 03:43:28,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:28,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:28,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-10 03:43:28,420 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:28,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1872873864, now seen corresponding path program 1 times [2022-02-10 03:43:28,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:28,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203228026] [2022-02-10 03:43:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:28,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:43:28,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:28,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203228026] [2022-02-10 03:43:28,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203228026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:43:28,499 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:43:28,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 03:43:28,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957155213] [2022-02-10 03:43:28,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:43:28,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 03:43:28,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:28,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 03:43:28,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-10 03:43:28,502 INFO L87 Difference]: Start difference. First operand 123 states and 245 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) [2022-02-10 03:43:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:28,557 INFO L93 Difference]: Finished difference Result 131 states and 253 transitions. [2022-02-10 03:43:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:43:28,557 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 [2022-02-10 03:43:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:28,558 INFO L225 Difference]: With dead ends: 131 [2022-02-10 03:43:28,558 INFO L226 Difference]: Without dead ends: 131 [2022-02-10 03:43:28,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:43:28,559 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:28,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:43:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-02-10 03:43:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 122. [2022-02-10 03:43:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.9834710743801653) internal successors, (240), 121 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 240 transitions. [2022-02-10 03:43:28,564 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 240 transitions. Word has length 20 [2022-02-10 03:43:28,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:28,564 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 240 transitions. [2022-02-10 03:43:28,564 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) [2022-02-10 03:43:28,564 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 240 transitions. [2022-02-10 03:43:28,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-10 03:43:28,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:28,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:28,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-10 03:43:28,565 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:28,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:28,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1615051400, now seen corresponding path program 1 times [2022-02-10 03:43:28,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:28,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367016805] [2022-02-10 03:43:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:28,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:43:28,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:28,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367016805] [2022-02-10 03:43:28,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367016805] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:43:28,603 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:43:28,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 03:43:28,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865256559] [2022-02-10 03:43:28,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:43:28,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:43:28,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:28,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:43:28,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:43:28,604 INFO L87 Difference]: Start difference. First operand 122 states and 240 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) [2022-02-10 03:43:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:28,647 INFO L93 Difference]: Finished difference Result 173 states and 340 transitions. [2022-02-10 03:43:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:43:28,648 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 [2022-02-10 03:43:28,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:28,648 INFO L225 Difference]: With dead ends: 173 [2022-02-10 03:43:28,649 INFO L226 Difference]: Without dead ends: 173 [2022-02-10 03:43:28,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-10 03:43:28,649 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 69 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:28,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 13 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:43:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-10 03:43:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 143. [2022-02-10 03:43:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.971830985915493) internal successors, (280), 142 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 280 transitions. [2022-02-10 03:43:28,654 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 280 transitions. Word has length 20 [2022-02-10 03:43:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:28,654 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 280 transitions. [2022-02-10 03:43:28,654 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) [2022-02-10 03:43:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 280 transitions. [2022-02-10 03:43:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-10 03:43:28,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:28,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:28,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-10 03:43:28,655 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash 196648534, now seen corresponding path program 1 times [2022-02-10 03:43:28,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:28,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372461537] [2022-02-10 03:43:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:28,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:28,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:28,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372461537] [2022-02-10 03:43:28,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372461537] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:28,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619982948] [2022-02-10 03:43:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:28,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:28,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:28,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:28,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-10 03:43:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:29,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:43:29,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:29,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:43:29,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-02-10 03:43:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:29,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:29,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:43:29,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 67 [2022-02-10 03:43:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:30,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619982948] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:30,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:30,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-10 03:43:30,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729612874] [2022-02-10 03:43:30,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:30,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:43:30,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:30,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:43:30,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:43:30,359 INFO L87 Difference]: Start difference. First operand 143 states and 280 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:30,645 INFO L93 Difference]: Finished difference Result 237 states and 443 transitions. [2022-02-10 03:43:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:43:30,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-10 03:43:30,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:30,646 INFO L225 Difference]: With dead ends: 237 [2022-02-10 03:43:30,646 INFO L226 Difference]: Without dead ends: 232 [2022-02-10 03:43:30,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:43:30,647 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 112 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:30,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 54 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:43:30,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-10 03:43:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 158. [2022-02-10 03:43:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.9426751592356688) internal successors, (305), 157 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:30,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 305 transitions. [2022-02-10 03:43:30,651 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 305 transitions. Word has length 22 [2022-02-10 03:43:30,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:30,651 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 305 transitions. [2022-02-10 03:43:30,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 305 transitions. [2022-02-10 03:43:30,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-10 03:43:30,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:30,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:30,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:30,855 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 [2022-02-10 03:43:30,856 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:30,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:30,856 INFO L85 PathProgramCache]: Analyzing trace with hash 805974298, now seen corresponding path program 2 times [2022-02-10 03:43:30,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:30,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94942405] [2022-02-10 03:43:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:30,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:31,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:31,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94942405] [2022-02-10 03:43:31,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94942405] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:31,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713409782] [2022-02-10 03:43:31,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:43:31,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:31,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:31,094 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:31,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-10 03:43:31,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:43:31,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:31,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:43:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:31,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:43:31,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-02-10 03:43:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:31,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:32,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:43:32,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 69 [2022-02-10 03:43:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:32,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713409782] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:32,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:32,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-02-10 03:43:32,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040107882] [2022-02-10 03:43:32,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:32,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:43:32,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:32,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:43:32,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:43:32,285 INFO L87 Difference]: Start difference. First operand 158 states and 305 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:33,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:33,033 INFO L93 Difference]: Finished difference Result 271 states and 507 transitions. [2022-02-10 03:43:33,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:43:33,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-10 03:43:33,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:33,034 INFO L225 Difference]: With dead ends: 271 [2022-02-10 03:43:33,034 INFO L226 Difference]: Without dead ends: 265 [2022-02-10 03:43:33,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:43:33,035 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 104 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:33,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 77 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:43:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-10 03:43:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 159. [2022-02-10 03:43:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.9430379746835442) internal successors, (307), 158 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 307 transitions. [2022-02-10 03:43:33,039 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 307 transitions. Word has length 22 [2022-02-10 03:43:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:33,039 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 307 transitions. [2022-02-10 03:43:33,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 307 transitions. [2022-02-10 03:43:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-10 03:43:33,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:33,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:33,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:33,256 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 [2022-02-10 03:43:33,257 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:33,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1394777570, now seen corresponding path program 3 times [2022-02-10 03:43:33,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:33,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173102052] [2022-02-10 03:43:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:33,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:33,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:33,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173102052] [2022-02-10 03:43:33,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173102052] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:33,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939397553] [2022-02-10 03:43:33,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:43:33,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:33,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:33,419 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:33,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-10 03:43:33,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:43:33,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:33,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:43:33,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:33,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-02-10 03:43:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:33,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:33,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:43:33,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-02-10 03:43:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:34,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939397553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:34,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:34,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-02-10 03:43:34,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704836088] [2022-02-10 03:43:34,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:34,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:43:34,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:34,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:43:34,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:43:34,263 INFO L87 Difference]: Start difference. First operand 159 states and 307 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:34,698 INFO L93 Difference]: Finished difference Result 258 states and 477 transitions. [2022-02-10 03:43:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:43:34,699 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-10 03:43:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:34,700 INFO L225 Difference]: With dead ends: 258 [2022-02-10 03:43:34,700 INFO L226 Difference]: Without dead ends: 252 [2022-02-10 03:43:34,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:43:34,700 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:34,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 142 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:43:34,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-10 03:43:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 168. [2022-02-10 03:43:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9221556886227544) internal successors, (321), 167 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 321 transitions. [2022-02-10 03:43:34,704 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 321 transitions. Word has length 22 [2022-02-10 03:43:34,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:34,704 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 321 transitions. [2022-02-10 03:43:34,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 321 transitions. [2022-02-10 03:43:34,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:34,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:34,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:34,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-10 03:43:34,915 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 [2022-02-10 03:43:34,915 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1778530228, now seen corresponding path program 4 times [2022-02-10 03:43:34,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:34,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248054345] [2022-02-10 03:43:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:34,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:34,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:34,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248054345] [2022-02-10 03:43:34,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248054345] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:34,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962537777] [2022-02-10 03:43:34,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:43:34,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:34,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:34,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:34,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-10 03:43:34,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:43:34,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:34,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:43:34,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:35,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:35,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962537777] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:35,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:35,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-10 03:43:35,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072633910] [2022-02-10 03:43:35,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:35,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:43:35,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:43:35,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:43:35,173 INFO L87 Difference]: Start difference. First operand 168 states and 321 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:35,713 INFO L93 Difference]: Finished difference Result 507 states and 929 transitions. [2022-02-10 03:43:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-10 03:43:35,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:43:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:35,716 INFO L225 Difference]: With dead ends: 507 [2022-02-10 03:43:35,716 INFO L226 Difference]: Without dead ends: 507 [2022-02-10 03:43:35,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=492, Invalid=1488, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:43:35,718 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 197 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:35,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 173 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:43:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-10 03:43:35,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 202. [2022-02-10 03:43:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.9751243781094527) internal successors, (397), 201 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 397 transitions. [2022-02-10 03:43:35,729 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 397 transitions. Word has length 24 [2022-02-10 03:43:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:35,729 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 397 transitions. [2022-02-10 03:43:35,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 397 transitions. [2022-02-10 03:43:35,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:35,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:35,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:35,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:35,930 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 [2022-02-10 03:43:35,930 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:35,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:35,931 INFO L85 PathProgramCache]: Analyzing trace with hash -2007404748, now seen corresponding path program 1 times [2022-02-10 03:43:35,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:35,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104004474] [2022-02-10 03:43:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:35,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:43:35,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:35,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104004474] [2022-02-10 03:43:35,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104004474] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:35,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869932495] [2022-02-10 03:43:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:35,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:35,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:35,972 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:35,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-10 03:43:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:36,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 03:43:36,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:43:36,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:43:36,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869932495] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:36,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:36,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-10 03:43:36,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892113089] [2022-02-10 03:43:36,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:36,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 03:43:36,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:36,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 03:43:36,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:43:36,158 INFO L87 Difference]: Start difference. First operand 202 states and 397 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:36,307 INFO L93 Difference]: Finished difference Result 454 states and 874 transitions. [2022-02-10 03:43:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:43:36,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:43:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:36,308 INFO L225 Difference]: With dead ends: 454 [2022-02-10 03:43:36,308 INFO L226 Difference]: Without dead ends: 454 [2022-02-10 03:43:36,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:43:36,309 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 164 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:36,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 31 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:43:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-02-10 03:43:36,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 316. [2022-02-10 03:43:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.123809523809524) internal successors, (669), 315 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 669 transitions. [2022-02-10 03:43:36,314 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 669 transitions. Word has length 24 [2022-02-10 03:43:36,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:36,314 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 669 transitions. [2022-02-10 03:43:36,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 669 transitions. [2022-02-10 03:43:36,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:36,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:36,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:36,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:36,530 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 [2022-02-10 03:43:36,531 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:36,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:36,531 INFO L85 PathProgramCache]: Analyzing trace with hash 437814964, now seen corresponding path program 5 times [2022-02-10 03:43:36,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:36,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385355184] [2022-02-10 03:43:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:36,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:36,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:36,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385355184] [2022-02-10 03:43:36,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385355184] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:36,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63425762] [2022-02-10 03:43:36,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:43:36,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:36,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:36,596 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:36,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-10 03:43:36,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:43:36,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:36,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:43:36,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:36,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:36,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63425762] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:36,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:36,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-10 03:43:36,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863287763] [2022-02-10 03:43:36,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:36,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:43:36,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:36,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:43:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:43:36,774 INFO L87 Difference]: Start difference. First operand 316 states and 669 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:37,099 INFO L93 Difference]: Finished difference Result 798 states and 1650 transitions. [2022-02-10 03:43:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:43:37,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:43:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:37,101 INFO L225 Difference]: With dead ends: 798 [2022-02-10 03:43:37,101 INFO L226 Difference]: Without dead ends: 791 [2022-02-10 03:43:37,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:43:37,102 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 257 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:37,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 107 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:43:37,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-10 03:43:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 541. [2022-02-10 03:43:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.224074074074074) internal successors, (1201), 540 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1201 transitions. [2022-02-10 03:43:37,114 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1201 transitions. Word has length 24 [2022-02-10 03:43:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:37,117 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1201 transitions. [2022-02-10 03:43:37,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:37,118 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1201 transitions. [2022-02-10 03:43:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:37,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:37,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:37,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:37,332 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 [2022-02-10 03:43:37,332 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1364786488, now seen corresponding path program 2 times [2022-02-10 03:43:37,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:37,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808109580] [2022-02-10 03:43:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:37,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:37,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:37,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808109580] [2022-02-10 03:43:37,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808109580] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:37,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010276359] [2022-02-10 03:43:37,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:43:37,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:37,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:37,369 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:37,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-10 03:43:37,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:43:37,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:37,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 03:43:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:37,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:37,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010276359] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:37,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:37,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-10 03:43:37,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375435862] [2022-02-10 03:43:37,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:37,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 03:43:37,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 03:43:37,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:43:37,537 INFO L87 Difference]: Start difference. First operand 541 states and 1201 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:37,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:37,707 INFO L93 Difference]: Finished difference Result 920 states and 1841 transitions. [2022-02-10 03:43:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:43:37,707 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:43:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:37,709 INFO L225 Difference]: With dead ends: 920 [2022-02-10 03:43:37,709 INFO L226 Difference]: Without dead ends: 920 [2022-02-10 03:43:37,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:43:37,709 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 129 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:37,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 64 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:43:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-02-10 03:43:37,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 579. [2022-02-10 03:43:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.1747404844290656) internal successors, (1257), 578 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1257 transitions. [2022-02-10 03:43:37,718 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1257 transitions. Word has length 24 [2022-02-10 03:43:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:37,718 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1257 transitions. [2022-02-10 03:43:37,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1257 transitions. [2022-02-10 03:43:37,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:37,720 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:37,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:37,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:37,935 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 [2022-02-10 03:43:37,935 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:37,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:37,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1520202116, now seen corresponding path program 6 times [2022-02-10 03:43:37,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:37,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922196703] [2022-02-10 03:43:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:37,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:37,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:37,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922196703] [2022-02-10 03:43:37,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922196703] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:37,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670211340] [2022-02-10 03:43:37,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:43:37,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:37,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:37,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:37,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-10 03:43:38,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-10 03:43:38,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:38,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:43:38,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:38,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:38,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670211340] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:38,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:38,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-10 03:43:38,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102195848] [2022-02-10 03:43:38,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:38,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:43:38,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:43:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:43:38,148 INFO L87 Difference]: Start difference. First operand 579 states and 1257 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) [2022-02-10 03:43:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:38,509 INFO L93 Difference]: Finished difference Result 1166 states and 2392 transitions. [2022-02-10 03:43:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-10 03:43:38,510 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 [2022-02-10 03:43:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:38,512 INFO L225 Difference]: With dead ends: 1166 [2022-02-10 03:43:38,512 INFO L226 Difference]: Without dead ends: 1166 [2022-02-10 03:43:38,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:43:38,513 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 147 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:38,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 98 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:43:38,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2022-02-10 03:43:38,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 584. [2022-02-10 03:43:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.171526586620926) internal successors, (1266), 583 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1266 transitions. [2022-02-10 03:43:38,535 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1266 transitions. Word has length 24 [2022-02-10 03:43:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:38,535 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1266 transitions. [2022-02-10 03:43:38,535 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) [2022-02-10 03:43:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1266 transitions. [2022-02-10 03:43:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:38,537 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:38,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:38,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:38,739 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 [2022-02-10 03:43:38,739 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:38,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1873818808, now seen corresponding path program 7 times [2022-02-10 03:43:38,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:38,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515217975] [2022-02-10 03:43:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:38,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:38,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:38,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515217975] [2022-02-10 03:43:38,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515217975] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:38,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825346158] [2022-02-10 03:43:38,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:43:38,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:38,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:38,785 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:38,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-10 03:43:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:38,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:43:38,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:38,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:38,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825346158] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:38,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:38,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-10 03:43:38,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301952460] [2022-02-10 03:43:38,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:38,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 03:43:38,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:38,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 03:43:38,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:43:38,948 INFO L87 Difference]: Start difference. First operand 584 states and 1266 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:39,220 INFO L93 Difference]: Finished difference Result 1141 states and 2328 transitions. [2022-02-10 03:43:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:43:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:43:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:39,222 INFO L225 Difference]: With dead ends: 1141 [2022-02-10 03:43:39,222 INFO L226 Difference]: Without dead ends: 1141 [2022-02-10 03:43:39,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:43:39,223 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 188 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:39,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 144 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:43:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-02-10 03:43:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 821. [2022-02-10 03:43:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.2621951219512195) internal successors, (1855), 820 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1855 transitions. [2022-02-10 03:43:39,234 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1855 transitions. Word has length 24 [2022-02-10 03:43:39,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:39,235 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1855 transitions. [2022-02-10 03:43:39,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1855 transitions. [2022-02-10 03:43:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:39,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:39,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:39,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:39,436 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 [2022-02-10 03:43:39,437 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:39,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1749610500, now seen corresponding path program 8 times [2022-02-10 03:43:39,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:39,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527399769] [2022-02-10 03:43:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:39,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:39,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:39,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527399769] [2022-02-10 03:43:39,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527399769] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:39,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289244247] [2022-02-10 03:43:39,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:43:39,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:39,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:39,500 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:39,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-10 03:43:39,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:43:39,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:39,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:43:39,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:39,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:39,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289244247] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:39,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:39,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-10 03:43:39,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657099129] [2022-02-10 03:43:39,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:39,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:43:39,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:39,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:43:39,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:43:39,668 INFO L87 Difference]: Start difference. First operand 821 states and 1855 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) [2022-02-10 03:43:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:40,066 INFO L93 Difference]: Finished difference Result 1523 states and 3273 transitions. [2022-02-10 03:43:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:43:40,067 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 [2022-02-10 03:43:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:40,069 INFO L225 Difference]: With dead ends: 1523 [2022-02-10 03:43:40,069 INFO L226 Difference]: Without dead ends: 1522 [2022-02-10 03:43:40,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=1197, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 03:43:40,070 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 165 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:40,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 129 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:43:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-02-10 03:43:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 854. [2022-02-10 03:43:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.246189917936694) internal successors, (1916), 853 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:40,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1916 transitions. [2022-02-10 03:43:40,144 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1916 transitions. Word has length 24 [2022-02-10 03:43:40,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:40,144 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1916 transitions. [2022-02-10 03:43:40,144 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) [2022-02-10 03:43:40,144 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1916 transitions. [2022-02-10 03:43:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:40,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:40,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:40,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:40,355 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 [2022-02-10 03:43:40,355 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:40,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:40,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1212838136, now seen corresponding path program 3 times [2022-02-10 03:43:40,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:40,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889382087] [2022-02-10 03:43:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:40,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:43:40,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:40,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889382087] [2022-02-10 03:43:40,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889382087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:40,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425261012] [2022-02-10 03:43:40,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:43:40,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:40,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:40,404 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:40,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-10 03:43:40,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:43:40,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 03:43:40,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:43:40,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:43:40,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425261012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:40,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:40,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-02-10 03:43:40,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460031396] [2022-02-10 03:43:40,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:40,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-10 03:43:40,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:40,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-10 03:43:40,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-10 03:43:40,546 INFO L87 Difference]: Start difference. First operand 854 states and 1916 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:40,646 INFO L93 Difference]: Finished difference Result 1018 states and 2194 transitions. [2022-02-10 03:43:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:43:40,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 [2022-02-10 03:43:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:40,651 INFO L225 Difference]: With dead ends: 1018 [2022-02-10 03:43:40,651 INFO L226 Difference]: Without dead ends: 1018 [2022-02-10 03:43:40,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:43:40,652 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 105 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:40,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 49 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:43:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-02-10 03:43:40,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 835. [2022-02-10 03:43:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 2.2553956834532376) internal successors, (1881), 834 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1881 transitions. [2022-02-10 03:43:40,665 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1881 transitions. Word has length 24 [2022-02-10 03:43:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:40,665 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1881 transitions. [2022-02-10 03:43:40,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:40,666 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1881 transitions. [2022-02-10 03:43:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:40,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:40,667 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:40,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:40,883 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 [2022-02-10 03:43:40,883 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:40,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1763307140, now seen corresponding path program 9 times [2022-02-10 03:43:40,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:40,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20379658] [2022-02-10 03:43:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:40,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:40,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:40,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20379658] [2022-02-10 03:43:40,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20379658] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:40,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455913761] [2022-02-10 03:43:40,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:43:40,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:40,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:40,917 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:40,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-10 03:43:40,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:43:40,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:40,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:43:40,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:41,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:41,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455913761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:41,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:41,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-10 03:43:41,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997593062] [2022-02-10 03:43:41,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:41,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 03:43:41,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:41,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 03:43:41,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:43:41,059 INFO L87 Difference]: Start difference. First operand 835 states and 1881 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:41,295 INFO L93 Difference]: Finished difference Result 1257 states and 2700 transitions. [2022-02-10 03:43:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:43:41,295 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:43:41,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:41,297 INFO L225 Difference]: With dead ends: 1257 [2022-02-10 03:43:41,297 INFO L226 Difference]: Without dead ends: 1257 [2022-02-10 03:43:41,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:43:41,298 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:41,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 111 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:43:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-02-10 03:43:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 891. [2022-02-10 03:43:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.251685393258427) internal successors, (2004), 890 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2004 transitions. [2022-02-10 03:43:41,311 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2004 transitions. Word has length 24 [2022-02-10 03:43:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:41,311 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2004 transitions. [2022-02-10 03:43:41,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2004 transitions. [2022-02-10 03:43:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:41,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:41,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:41,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:41,528 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 [2022-02-10 03:43:41,529 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:41,529 INFO L85 PathProgramCache]: Analyzing trace with hash 85686396, now seen corresponding path program 10 times [2022-02-10 03:43:41,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:41,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486353301] [2022-02-10 03:43:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:41,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:41,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:41,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486353301] [2022-02-10 03:43:41,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486353301] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:41,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256685275] [2022-02-10 03:43:41,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:43:41,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:41,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:41,583 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:41,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-10 03:43:41,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:43:41,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:41,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:43:41,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:41,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:43:41,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256685275] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:41,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:41,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-10 03:43:41,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937659825] [2022-02-10 03:43:41,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:41,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:43:41,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:41,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:43:41,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:43:41,755 INFO L87 Difference]: Start difference. First operand 891 states and 2004 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:42,004 INFO L93 Difference]: Finished difference Result 1151 states and 2521 transitions. [2022-02-10 03:43:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:43:42,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:43:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:42,006 INFO L225 Difference]: With dead ends: 1151 [2022-02-10 03:43:42,006 INFO L226 Difference]: Without dead ends: 1149 [2022-02-10 03:43:42,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:43:42,007 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 136 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:42,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 117 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:43:42,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-02-10 03:43:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1019. [2022-02-10 03:43:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.2858546168958744) internal successors, (2327), 1018 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2327 transitions. [2022-02-10 03:43:42,019 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2327 transitions. Word has length 24 [2022-02-10 03:43:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:42,019 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 2327 transitions. [2022-02-10 03:43:42,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2327 transitions. [2022-02-10 03:43:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:42,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:42,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:42,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:42,235 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 [2022-02-10 03:43:42,236 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:42,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1903831492, now seen corresponding path program 11 times [2022-02-10 03:43:42,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:42,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538661109] [2022-02-10 03:43:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:42,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:43:42,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:42,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538661109] [2022-02-10 03:43:42,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538661109] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:42,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864751569] [2022-02-10 03:43:42,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:43:42,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:42,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:42,286 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:42,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-10 03:43:42,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:43:42,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:43:42,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:43:42,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:43:42,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864751569] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:42,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:42,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-10 03:43:42,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743173049] [2022-02-10 03:43:42,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:42,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 03:43:42,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:42,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 03:43:42,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:43:42,427 INFO L87 Difference]: Start difference. First operand 1019 states and 2327 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:42,628 INFO L93 Difference]: Finished difference Result 1424 states and 3124 transitions. [2022-02-10 03:43:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:43:42,628 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:43:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:42,630 INFO L225 Difference]: With dead ends: 1424 [2022-02-10 03:43:42,631 INFO L226 Difference]: Without dead ends: 1423 [2022-02-10 03:43:42,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:43:42,632 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 153 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:42,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 72 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:43:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-02-10 03:43:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1019. [2022-02-10 03:43:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.2848722986247543) internal successors, (2326), 1018 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2326 transitions. [2022-02-10 03:43:42,648 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2326 transitions. Word has length 24 [2022-02-10 03:43:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:42,649 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 2326 transitions. [2022-02-10 03:43:42,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2326 transitions. [2022-02-10 03:43:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:42,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:42,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:42,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:42,866 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 [2022-02-10 03:43:42,866 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:42,867 INFO L85 PathProgramCache]: Analyzing trace with hash -369242560, now seen corresponding path program 12 times [2022-02-10 03:43:42,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:42,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449584380] [2022-02-10 03:43:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:42,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:42,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:42,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449584380] [2022-02-10 03:43:42,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449584380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:42,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728434184] [2022-02-10 03:43:42,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:43:42,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:42,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:42,908 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:42,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-10 03:43:42,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:43:42,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:42,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:43:42,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:42,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:43,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728434184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:43,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:43,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-10 03:43:43,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771751670] [2022-02-10 03:43:43,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:43,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 03:43:43,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:43,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 03:43:43,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-10 03:43:43,060 INFO L87 Difference]: Start difference. First operand 1019 states and 2326 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:43,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:43,309 INFO L93 Difference]: Finished difference Result 1430 states and 3155 transitions. [2022-02-10 03:43:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:43:43,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:43:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:43,312 INFO L225 Difference]: With dead ends: 1430 [2022-02-10 03:43:43,312 INFO L226 Difference]: Without dead ends: 1430 [2022-02-10 03:43:43,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:43:43,312 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:43,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 129 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:43:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-02-10 03:43:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1042. [2022-02-10 03:43:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.2804995196926034) internal successors, (2374), 1041 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2374 transitions. [2022-02-10 03:43:43,327 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2374 transitions. Word has length 24 [2022-02-10 03:43:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:43,328 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 2374 transitions. [2022-02-10 03:43:43,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:43,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2374 transitions. [2022-02-10 03:43:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:43:43,330 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:43,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:43,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:43,544 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 [2022-02-10 03:43:43,545 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash -715193216, now seen corresponding path program 13 times [2022-02-10 03:43:43,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:43,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415893640] [2022-02-10 03:43:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:43,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:43,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:43,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415893640] [2022-02-10 03:43:43,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415893640] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:43,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456026647] [2022-02-10 03:43:43,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:43:43,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:43,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:43,599 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:43,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:43:43,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:43,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-10 03:43:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:43,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:43,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456026647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:43,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:43,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-02-10 03:43:43,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693163213] [2022-02-10 03:43:43,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:43,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:43:43,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:43,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:43:43,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:43:43,820 INFO L87 Difference]: Start difference. First operand 1042 states and 2374 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:44,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:44,071 INFO L93 Difference]: Finished difference Result 1445 states and 3168 transitions. [2022-02-10 03:43:44,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:43:44,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:43:44,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:44,074 INFO L225 Difference]: With dead ends: 1445 [2022-02-10 03:43:44,074 INFO L226 Difference]: Without dead ends: 1442 [2022-02-10 03:43:44,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:43:44,075 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 145 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:44,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 110 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:43:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2022-02-10 03:43:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1045. [2022-02-10 03:43:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.2768199233716473) internal successors, (2377), 1044 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2377 transitions. [2022-02-10 03:43:44,091 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2377 transitions. Word has length 24 [2022-02-10 03:43:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:44,091 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 2377 transitions. [2022-02-10 03:43:44,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2377 transitions. [2022-02-10 03:43:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:43:44,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:44,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:44,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-10 03:43:44,309 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 [2022-02-10 03:43:44,309 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:44,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:44,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2057447698, now seen corresponding path program 4 times [2022-02-10 03:43:44,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:44,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984283631] [2022-02-10 03:43:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:44,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:44,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:44,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984283631] [2022-02-10 03:43:44,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984283631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:44,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101128411] [2022-02-10 03:43:44,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:43:44,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:44,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:44,841 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:44,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-10 03:43:44,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:43:44,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:43:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:45,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:43:45,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:43:45,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-10 03:43:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:45,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:46,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:43:46,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:43:46,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 343 treesize of output 269 [2022-02-10 03:43:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:50,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101128411] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:43:50,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:43:50,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-10 03:43:50,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631202129] [2022-02-10 03:43:50,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:43:50,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:43:50,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:43:50,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:43:50,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:43:50,406 INFO L87 Difference]: Start difference. First operand 1045 states and 2377 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:43:55,668 INFO L93 Difference]: Finished difference Result 1783 states and 3732 transitions. [2022-02-10 03:43:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-10 03:43:55,669 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:43:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:43:55,672 INFO L225 Difference]: With dead ends: 1783 [2022-02-10 03:43:55,672 INFO L226 Difference]: Without dead ends: 1773 [2022-02-10 03:43:55,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=861, Invalid=3561, Unknown=0, NotChecked=0, Total=4422 [2022-02-10 03:43:55,674 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 317 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:43:55,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 177 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-10 03:43:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2022-02-10 03:43:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1085. [2022-02-10 03:43:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 2.2924354243542435) internal successors, (2485), 1084 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:55,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 2485 transitions. [2022-02-10 03:43:55,698 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 2485 transitions. Word has length 26 [2022-02-10 03:43:55,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:43:55,698 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 2485 transitions. [2022-02-10 03:43:55,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:43:55,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 2485 transitions. [2022-02-10 03:43:55,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:43:55,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:43:55,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:43:55,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-10 03:43:55,900 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 [2022-02-10 03:43:55,901 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:43:55,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:43:55,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1983730474, now seen corresponding path program 5 times [2022-02-10 03:43:55,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:43:55,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576976869] [2022-02-10 03:43:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:43:55,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:43:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:43:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:56,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:43:56,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576976869] [2022-02-10 03:43:56,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576976869] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:43:56,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537245289] [2022-02-10 03:43:56,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:43:56,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:43:56,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:43:56,609 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:43:56,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-10 03:43:56,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:43:56,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:43:56,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:43:56,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:43:57,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:43:57,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:43:57,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-10 03:43:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:43:57,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:43:58,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:43:58,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:43:58,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 335 treesize of output 261 [2022-02-10 03:44:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:44:01,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537245289] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:44:01,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:44:01,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-10 03:44:01,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962064285] [2022-02-10 03:44:01,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:44:01,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:44:01,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:44:01,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:44:01,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:44:01,741 INFO L87 Difference]: Start difference. First operand 1085 states and 2485 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:44:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:44:14,271 INFO L93 Difference]: Finished difference Result 1979 states and 4116 transitions. [2022-02-10 03:44:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-10 03:44:14,271 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:44:14,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:44:14,275 INFO L225 Difference]: With dead ends: 1979 [2022-02-10 03:44:14,275 INFO L226 Difference]: Without dead ends: 1969 [2022-02-10 03:44:14,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2779 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1209, Invalid=7163, Unknown=0, NotChecked=0, Total=8372 [2022-02-10 03:44:14,279 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 399 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-10 03:44:14,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 315 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1250 Invalid, 0 Unknown, 72 Unchecked, 0.9s Time] [2022-02-10 03:44:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2022-02-10 03:44:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1098. [2022-02-10 03:44:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 2.2907930720145853) internal successors, (2513), 1097 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:44:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2513 transitions. [2022-02-10 03:44:14,298 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2513 transitions. Word has length 26 [2022-02-10 03:44:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:44:14,298 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 2513 transitions. [2022-02-10 03:44:14,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:44:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2513 transitions. [2022-02-10 03:44:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:44:14,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:44:14,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:44:14,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-10 03:44:14,518 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 [2022-02-10 03:44:14,518 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:44:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:44:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash 207700114, now seen corresponding path program 14 times [2022-02-10 03:44:14,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:44:14,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886350544] [2022-02-10 03:44:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:44:14,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:44:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:44:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:44:15,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:44:15,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886350544] [2022-02-10 03:44:15,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886350544] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:44:15,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343254792] [2022-02-10 03:44:15,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:44:15,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:44:15,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:44:15,162 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:44:15,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-10 03:44:15,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:44:15,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:44:15,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:44:15,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:44:15,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:44:15,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:44:15,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:44:15,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-02-10 03:44:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:44:16,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:44:17,663 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:44:17,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-02-10 03:44:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:44:20,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343254792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:44:20,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:44:20,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-10 03:44:20,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445394713] [2022-02-10 03:44:20,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:44:20,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:44:20,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:44:20,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:44:20,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:44:20,409 INFO L87 Difference]: Start difference. First operand 1098 states and 2513 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:44:26,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:44:26,029 INFO L93 Difference]: Finished difference Result 1726 states and 3814 transitions. [2022-02-10 03:44:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-10 03:44:26,030 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:44:26,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:44:26,033 INFO L225 Difference]: With dead ends: 1726 [2022-02-10 03:44:26,033 INFO L226 Difference]: Without dead ends: 1714 [2022-02-10 03:44:26,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=746, Invalid=4366, Unknown=0, NotChecked=0, Total=5112 [2022-02-10 03:44:26,034 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 232 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-10 03:44:26,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 213 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-10 03:44:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-02-10 03:44:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1114. [2022-02-10 03:44:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.2812219227313566) internal successors, (2539), 1113 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:44:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 2539 transitions. [2022-02-10 03:44:26,055 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 2539 transitions. Word has length 26 [2022-02-10 03:44:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:44:26,055 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 2539 transitions. [2022-02-10 03:44:26,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:44:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 2539 transitions. [2022-02-10 03:44:26,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:44:26,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:44:26,057 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:44:26,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-10 03:44:26,282 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 [2022-02-10 03:44:26,283 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:44:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:44:26,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1134671638, now seen corresponding path program 6 times [2022-02-10 03:44:26,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:44:26,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434226689] [2022-02-10 03:44:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:44:26,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:44:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:44:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:44:27,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:44:27,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434226689] [2022-02-10 03:44:27,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434226689] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:44:27,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413948848] [2022-02-10 03:44:27,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:44:27,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:44:27,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:44:27,038 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:44:27,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-10 03:44:27,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:44:27,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:44:27,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:44:27,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:44:28,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:44:28,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-10 03:44:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:44:29,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:44:30,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:44:30,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:44:30,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:44:30,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 335 treesize of output 253 [2022-02-10 03:44:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:44:32,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413948848] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:44:32,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:44:32,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-02-10 03:44:32,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869930861] [2022-02-10 03:44:32,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:44:32,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:44:32,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:44:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:44:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:44:32,874 INFO L87 Difference]: Start difference. First operand 1114 states and 2539 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:44:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:44:49,907 INFO L93 Difference]: Finished difference Result 1928 states and 4045 transitions. [2022-02-10 03:44:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-10 03:44:49,907 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:44:49,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:44:49,910 INFO L225 Difference]: With dead ends: 1928 [2022-02-10 03:44:49,910 INFO L226 Difference]: Without dead ends: 1907 [2022-02-10 03:44:49,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=1846, Invalid=10364, Unknown=0, NotChecked=0, Total=12210 [2022-02-10 03:44:49,914 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 412 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:44:49,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 294 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-10 03:44:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2022-02-10 03:44:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1131. [2022-02-10 03:44:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 2.275221238938053) internal successors, (2571), 1130 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:44:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 2571 transitions. [2022-02-10 03:44:49,936 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 2571 transitions. Word has length 26 [2022-02-10 03:44:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:44:49,936 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 2571 transitions. [2022-02-10 03:44:49,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:44:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 2571 transitions. [2022-02-10 03:44:49,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:44:49,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:44:49,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:44:49,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-10 03:44:50,154 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 [2022-02-10 03:44:50,155 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:44:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:44:50,155 INFO L85 PathProgramCache]: Analyzing trace with hash 245927254, now seen corresponding path program 7 times [2022-02-10 03:44:50,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:44:50,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682988202] [2022-02-10 03:44:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:44:50,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:44:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:44:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:44:51,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:44:51,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682988202] [2022-02-10 03:44:51,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682988202] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:44:51,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408137480] [2022-02-10 03:44:51,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:44:51,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:44:51,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:44:51,030 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:44:51,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-10 03:44:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:44:51,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:44:51,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:44:51,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:44:51,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:44:51,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:44:51,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 83 [2022-02-10 03:44:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:44:52,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:44:53,802 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:44:53,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 335 treesize of output 261 [2022-02-10 03:44:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:44:58,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408137480] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:44:58,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:44:58,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:44:58,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587320703] [2022-02-10 03:44:58,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:44:58,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:44:58,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:44:58,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:44:58,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:44:58,306 INFO L87 Difference]: Start difference. First operand 1131 states and 2571 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:45:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:45:08,281 INFO L93 Difference]: Finished difference Result 1824 states and 3811 transitions. [2022-02-10 03:45:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-10 03:45:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:45:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:45:08,284 INFO L225 Difference]: With dead ends: 1824 [2022-02-10 03:45:08,284 INFO L226 Difference]: Without dead ends: 1802 [2022-02-10 03:45:08,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2621 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1106, Invalid=7084, Unknown=0, NotChecked=0, Total=8190 [2022-02-10 03:45:08,298 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 341 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:45:08,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 313 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1653 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-10 03:45:08,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-02-10 03:45:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1144. [2022-02-10 03:45:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 2.2712160979877516) internal successors, (2596), 1143 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:45:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 2596 transitions. [2022-02-10 03:45:08,333 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 2596 transitions. Word has length 26 [2022-02-10 03:45:08,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:45:08,333 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 2596 transitions. [2022-02-10 03:45:08,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:45:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 2596 transitions. [2022-02-10 03:45:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:45:08,335 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:45:08,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:45:08,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-10 03:45:08,563 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 [2022-02-10 03:45:08,564 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:45:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:45:08,565 INFO L85 PathProgramCache]: Analyzing trace with hash 982723286, now seen corresponding path program 8 times [2022-02-10 03:45:08,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:45:08,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361740989] [2022-02-10 03:45:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:45:08,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:45:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:45:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:45:08,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:45:08,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361740989] [2022-02-10 03:45:08,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361740989] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:45:08,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720141670] [2022-02-10 03:45:08,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:45:08,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:45:08,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:45:08,992 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:45:08,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-10 03:45:09,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:45:09,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:45:09,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:45:09,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:45:09,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:45:09,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-10 03:45:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:45:10,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:45:12,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:45:12,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:45:12,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:45:12,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 339 treesize of output 253 [2022-02-10 03:45:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:45:16,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720141670] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:45:16,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:45:16,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-10 03:45:16,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741447438] [2022-02-10 03:45:16,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:45:16,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:45:16,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:45:16,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:45:16,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:45:16,785 INFO L87 Difference]: Start difference. First operand 1144 states and 2596 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:45:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:45:32,623 INFO L93 Difference]: Finished difference Result 1915 states and 4059 transitions. [2022-02-10 03:45:32,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-10 03:45:32,624 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:45:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:45:32,626 INFO L225 Difference]: With dead ends: 1915 [2022-02-10 03:45:32,626 INFO L226 Difference]: Without dead ends: 1886 [2022-02-10 03:45:32,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4743 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=2122, Invalid=10988, Unknown=0, NotChecked=0, Total=13110 [2022-02-10 03:45:32,629 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 443 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:45:32,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 287 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-10 03:45:32,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2022-02-10 03:45:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1176. [2022-02-10 03:45:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.275744680851064) internal successors, (2674), 1175 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:45:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2674 transitions. [2022-02-10 03:45:32,647 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2674 transitions. Word has length 26 [2022-02-10 03:45:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:45:32,647 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 2674 transitions. [2022-02-10 03:45:32,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:45:32,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2674 transitions. [2022-02-10 03:45:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:45:32,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:45:32,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:45:32,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-10 03:45:32,855 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 [2022-02-10 03:45:32,855 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:45:32,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:45:32,856 INFO L85 PathProgramCache]: Analyzing trace with hash -608702818, now seen corresponding path program 9 times [2022-02-10 03:45:32,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:45:32,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790401349] [2022-02-10 03:45:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:45:32,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:45:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:45:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:45:33,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:45:33,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790401349] [2022-02-10 03:45:33,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790401349] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:45:33,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004750214] [2022-02-10 03:45:33,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:45:33,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:45:33,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:45:33,313 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:45:33,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-10 03:45:33,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:45:33,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:45:33,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:45:33,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:45:33,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:45:33,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 81 [2022-02-10 03:45:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:45:35,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:45:36,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:45:36,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:45:36,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:45:36,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 347 treesize of output 253 [2022-02-10 03:45:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:45:41,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004750214] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:45:41,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:45:41,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-02-10 03:45:41,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316423788] [2022-02-10 03:45:41,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:45:41,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:45:41,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:45:41,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:45:41,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:45:41,480 INFO L87 Difference]: Start difference. First operand 1176 states and 2674 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:45:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:45:49,003 INFO L93 Difference]: Finished difference Result 1733 states and 3724 transitions. [2022-02-10 03:45:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-10 03:45:49,003 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:45:49,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:45:49,006 INFO L225 Difference]: With dead ends: 1733 [2022-02-10 03:45:49,006 INFO L226 Difference]: Without dead ends: 1717 [2022-02-10 03:45:49,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=973, Invalid=4577, Unknown=0, NotChecked=0, Total=5550 [2022-02-10 03:45:49,007 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 467 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:45:49,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 215 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1130 Invalid, 0 Unknown, 342 Unchecked, 0.8s Time] [2022-02-10 03:45:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-02-10 03:45:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1203. [2022-02-10 03:45:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 2.265391014975042) internal successors, (2723), 1202 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:45:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 2723 transitions. [2022-02-10 03:45:49,026 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 2723 transitions. Word has length 26 [2022-02-10 03:45:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:45:49,026 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 2723 transitions. [2022-02-10 03:45:49,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:45:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 2723 transitions. [2022-02-10 03:45:49,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:45:49,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:45:49,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:45:49,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-10 03:45:49,236 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 [2022-02-10 03:45:49,236 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:45:49,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:45:49,236 INFO L85 PathProgramCache]: Analyzing trace with hash -908829230, now seen corresponding path program 10 times [2022-02-10 03:45:49,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:45:49,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135295939] [2022-02-10 03:45:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:45:49,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:45:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:45:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:45:49,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:45:49,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135295939] [2022-02-10 03:45:49,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135295939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:45:49,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470069395] [2022-02-10 03:45:49,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:45:49,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:45:49,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:45:49,844 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:45:49,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-10 03:45:49,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:45:49,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:45:49,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:45:49,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:45:50,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:45:50,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:45:50,260 INFO L387 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 109 treesize of output 83 [2022-02-10 03:45:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:45:51,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:45:54,009 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:45:54,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 459 treesize of output 333 [2022-02-10 03:46:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:46:02,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470069395] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:46:02,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:46:02,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:46:02,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448064887] [2022-02-10 03:46:02,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:46:02,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:46:02,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:46:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:46:02,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:46:02,623 INFO L87 Difference]: Start difference. First operand 1203 states and 2723 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:46:09,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:46:09,158 INFO L93 Difference]: Finished difference Result 1839 states and 3891 transitions. [2022-02-10 03:46:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-10 03:46:09,160 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:46:09,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:46:09,162 INFO L225 Difference]: With dead ends: 1839 [2022-02-10 03:46:09,163 INFO L226 Difference]: Without dead ends: 1820 [2022-02-10 03:46:09,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=766, Invalid=4346, Unknown=0, NotChecked=0, Total=5112 [2022-02-10 03:46:09,164 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 305 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-10 03:46:09,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 211 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-10 03:46:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2022-02-10 03:46:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1234. [2022-02-10 03:46:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.253852392538524) internal successors, (2779), 1233 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:46:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 2779 transitions. [2022-02-10 03:46:09,180 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 2779 transitions. Word has length 26 [2022-02-10 03:46:09,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:46:09,180 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 2779 transitions. [2022-02-10 03:46:09,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:46:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 2779 transitions. [2022-02-10 03:46:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:46:09,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:46:09,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:46:09,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-10 03:46:09,398 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 [2022-02-10 03:46:09,398 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:46:09,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:46:09,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2064882602, now seen corresponding path program 11 times [2022-02-10 03:46:09,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:46:09,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488756951] [2022-02-10 03:46:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:46:09,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:46:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:46:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:46:09,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:46:09,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488756951] [2022-02-10 03:46:09,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488756951] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:46:09,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393663623] [2022-02-10 03:46:09,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:46:09,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:46:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:46:09,711 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:46:09,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-10 03:46:09,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:46:09,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:46:09,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:46:09,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:46:10,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:46:10,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:46:10,130 INFO L387 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 89 treesize of output 73 [2022-02-10 03:46:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:46:11,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:46:12,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:46:12,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:46:12,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 355 treesize of output 269 [2022-02-10 03:46:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:46:43,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393663623] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:46:43,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:46:43,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:46:43,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914584033] [2022-02-10 03:46:43,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:46:43,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:46:43,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:46:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:46:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:46:43,525 INFO L87 Difference]: Start difference. First operand 1234 states and 2779 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:46:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:46:48,261 INFO L93 Difference]: Finished difference Result 1772 states and 3686 transitions. [2022-02-10 03:46:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-10 03:46:48,261 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:46:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:46:48,264 INFO L225 Difference]: With dead ends: 1772 [2022-02-10 03:46:48,264 INFO L226 Difference]: Without dead ends: 1756 [2022-02-10 03:46:48,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=619, Invalid=3041, Unknown=0, NotChecked=0, Total=3660 [2022-02-10 03:46:48,265 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 282 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:46:48,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 168 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 607 Invalid, 0 Unknown, 171 Unchecked, 0.6s Time] [2022-02-10 03:46:48,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-02-10 03:46:48,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1266. [2022-02-10 03:46:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 2.2529644268774702) internal successors, (2850), 1265 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:46:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 2850 transitions. [2022-02-10 03:46:48,281 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 2850 transitions. Word has length 26 [2022-02-10 03:46:48,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:46:48,281 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 2850 transitions. [2022-02-10 03:46:48,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:46:48,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 2850 transitions. [2022-02-10 03:46:48,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:46:48,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:46:48,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:46:48,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-10 03:46:48,495 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 [2022-02-10 03:46:48,495 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:46:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:46:48,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1309294362, now seen corresponding path program 12 times [2022-02-10 03:46:48,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:46:48,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619093565] [2022-02-10 03:46:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:46:48,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:46:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:46:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:46:48,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:46:48,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619093565] [2022-02-10 03:46:48,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619093565] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:46:48,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720873852] [2022-02-10 03:46:48,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:46:48,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:46:48,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:46:48,874 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:46:48,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-10 03:46:48,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:46:48,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:46:48,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:46:48,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:46:49,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:46:49,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:46:49,283 INFO L387 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 89 treesize of output 73 [2022-02-10 03:46:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:46:50,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:46:51,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:46:51,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:46:51,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 355 treesize of output 269 [2022-02-10 03:47:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:47:08,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720873852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:47:08,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:47:08,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-02-10 03:47:08,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248884481] [2022-02-10 03:47:08,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:47:08,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:47:08,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:47:08,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:47:08,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:47:08,767 INFO L87 Difference]: Start difference. First operand 1266 states and 2850 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:47:15,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:47:15,525 INFO L93 Difference]: Finished difference Result 2096 states and 4380 transitions. [2022-02-10 03:47:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-10 03:47:15,526 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:47:15,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:47:15,529 INFO L225 Difference]: With dead ends: 2096 [2022-02-10 03:47:15,529 INFO L226 Difference]: Without dead ends: 2084 [2022-02-10 03:47:15,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1016, Invalid=5146, Unknown=0, NotChecked=0, Total=6162 [2022-02-10 03:47:15,531 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 418 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:47:15,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 260 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 892 Invalid, 0 Unknown, 298 Unchecked, 0.6s Time] [2022-02-10 03:47:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2022-02-10 03:47:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1265. [2022-02-10 03:47:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 2.252373417721519) internal successors, (2847), 1264 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:47:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2847 transitions. [2022-02-10 03:47:15,549 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2847 transitions. Word has length 26 [2022-02-10 03:47:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:47:15,549 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 2847 transitions. [2022-02-10 03:47:15,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:47:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2847 transitions. [2022-02-10 03:47:15,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:47:15,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:47:15,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:47:15,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-10 03:47:15,768 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 [2022-02-10 03:47:15,768 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:47:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:47:15,768 INFO L85 PathProgramCache]: Analyzing trace with hash -144428454, now seen corresponding path program 15 times [2022-02-10 03:47:15,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:47:15,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17459738] [2022-02-10 03:47:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:47:15,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:47:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:47:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:47:16,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:47:16,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17459738] [2022-02-10 03:47:16,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17459738] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:47:16,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593072449] [2022-02-10 03:47:16,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:47:16,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:47:16,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:47:16,486 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:47:16,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-10 03:47:16,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:47:16,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:47:16,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:47:16,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:47:17,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:47:17,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:47:17,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:47:17,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:47:17,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 107 [2022-02-10 03:47:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:47:19,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:47:28,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:47:28,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:47:28,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:47:28,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:47:28,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 165 [2022-02-10 03:47:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:47:28,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593072449] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:47:28,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:47:28,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2022-02-10 03:47:28,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624577527] [2022-02-10 03:47:28,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:47:28,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:47:28,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:47:28,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:47:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:47:28,938 INFO L87 Difference]: Start difference. First operand 1265 states and 2847 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:47:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:47:35,933 INFO L93 Difference]: Finished difference Result 1683 states and 3626 transitions. [2022-02-10 03:47:35,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-10 03:47:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:47:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:47:35,936 INFO L225 Difference]: With dead ends: 1683 [2022-02-10 03:47:35,936 INFO L226 Difference]: Without dead ends: 1654 [2022-02-10 03:47:35,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=867, Invalid=4683, Unknown=0, NotChecked=0, Total=5550 [2022-02-10 03:47:35,937 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 287 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:47:35,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 197 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 900 Invalid, 0 Unknown, 308 Unchecked, 0.5s Time] [2022-02-10 03:47:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-02-10 03:47:35,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1296. [2022-02-10 03:47:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 2.2463320463320464) internal successors, (2909), 1295 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:47:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 2909 transitions. [2022-02-10 03:47:35,953 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 2909 transitions. Word has length 26 [2022-02-10 03:47:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:47:35,954 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 2909 transitions. [2022-02-10 03:47:35,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:47:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 2909 transitions. [2022-02-10 03:47:35,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:47:35,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:47:35,955 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:47:35,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-10 03:47:36,163 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 [2022-02-10 03:47:36,164 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:47:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:47:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2008570082, now seen corresponding path program 16 times [2022-02-10 03:47:36,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:47:36,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339082965] [2022-02-10 03:47:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:47:36,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:47:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:47:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:47:36,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:47:36,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339082965] [2022-02-10 03:47:36,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339082965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:47:36,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167105020] [2022-02-10 03:47:36,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:47:36,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:47:36,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:47:36,722 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:47:36,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-10 03:47:36,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:47:36,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:47:36,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:47:36,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:47:37,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:47:37,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:47:37,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:47:37,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:47:37,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 75 [2022-02-10 03:47:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:47:37,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:47:39,992 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:47:39,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 363 treesize of output 245 [2022-02-10 03:47:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:47:41,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167105020] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:47:41,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:47:41,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-02-10 03:47:41,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205314926] [2022-02-10 03:47:41,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:47:41,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:47:41,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:47:41,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:47:41,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:47:41,937 INFO L87 Difference]: Start difference. First operand 1296 states and 2909 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:47:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:47:47,449 INFO L93 Difference]: Finished difference Result 1890 states and 4135 transitions. [2022-02-10 03:47:47,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-10 03:47:47,449 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:47:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:47:47,452 INFO L225 Difference]: With dead ends: 1890 [2022-02-10 03:47:47,452 INFO L226 Difference]: Without dead ends: 1876 [2022-02-10 03:47:47,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=864, Invalid=5456, Unknown=0, NotChecked=0, Total=6320 [2022-02-10 03:47:47,454 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 236 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:47:47,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 327 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1223 Invalid, 0 Unknown, 36 Unchecked, 0.8s Time] [2022-02-10 03:47:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2022-02-10 03:47:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1327. [2022-02-10 03:47:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 2.2390648567119156) internal successors, (2969), 1326 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:47:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 2969 transitions. [2022-02-10 03:47:47,473 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 2969 transitions. Word has length 26 [2022-02-10 03:47:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:47:47,473 INFO L470 AbstractCegarLoop]: Abstraction has 1327 states and 2969 transitions. [2022-02-10 03:47:47,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:47:47,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 2969 transitions. [2022-02-10 03:47:47,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:47:47,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:47:47,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:47:47,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-10 03:47:47,688 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 [2022-02-10 03:47:47,689 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:47:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:47:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1938107238, now seen corresponding path program 13 times [2022-02-10 03:47:47,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:47:47,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413843828] [2022-02-10 03:47:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:47:47,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:47:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:47:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:47:48,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:47:48,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413843828] [2022-02-10 03:47:48,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413843828] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:47:48,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024390851] [2022-02-10 03:47:48,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:47:48,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:47:48,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:47:48,473 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:47:48,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-10 03:47:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:47:48,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:47:48,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:47:49,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:47:49,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:47:49,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-10 03:47:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:47:49,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:47:51,893 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:47:51,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 339 treesize of output 261 [2022-02-10 03:47:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:47:59,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024390851] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:47:59,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:47:59,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-10 03:47:59,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317298863] [2022-02-10 03:47:59,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:47:59,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:47:59,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:47:59,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:47:59,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:47:59,094 INFO L87 Difference]: Start difference. First operand 1327 states and 2969 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:01,154 INFO L93 Difference]: Finished difference Result 1667 states and 3583 transitions. [2022-02-10 03:48:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:48:01,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:48:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:01,157 INFO L225 Difference]: With dead ends: 1667 [2022-02-10 03:48:01,157 INFO L226 Difference]: Without dead ends: 1653 [2022-02-10 03:48:01,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:48:01,158 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:01,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 156 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:48:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-02-10 03:48:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1333. [2022-02-10 03:48:01,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 2.2372372372372373) internal successors, (2980), 1332 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:01,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 2980 transitions. [2022-02-10 03:48:01,174 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 2980 transitions. Word has length 26 [2022-02-10 03:48:01,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:01,174 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 2980 transitions. [2022-02-10 03:48:01,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:01,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 2980 transitions. [2022-02-10 03:48:01,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:48:01,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:01,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:48:01,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-10 03:48:01,390 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 [2022-02-10 03:48:01,390 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:01,391 INFO L85 PathProgramCache]: Analyzing trace with hash -400894506, now seen corresponding path program 14 times [2022-02-10 03:48:01,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:01,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889284256] [2022-02-10 03:48:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:01,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:02,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:02,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889284256] [2022-02-10 03:48:02,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889284256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:02,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701754410] [2022-02-10 03:48:02,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:48:02,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:02,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:02,016 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:02,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-10 03:48:02,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:48:02,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:02,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:48:02,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:48:02,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:48:02,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-10 03:48:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:03,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:04,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:48:04,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:48:04,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 335 treesize of output 261 [2022-02-10 03:48:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:13,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701754410] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:13,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:13,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-10 03:48:13,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94900097] [2022-02-10 03:48:13,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:13,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:48:13,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:48:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:48:13,107 INFO L87 Difference]: Start difference. First operand 1333 states and 2980 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:17,274 INFO L93 Difference]: Finished difference Result 1792 states and 3787 transitions. [2022-02-10 03:48:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-10 03:48:17,274 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:48:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:17,277 INFO L225 Difference]: With dead ends: 1792 [2022-02-10 03:48:17,277 INFO L226 Difference]: Without dead ends: 1782 [2022-02-10 03:48:17,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=603, Invalid=3057, Unknown=0, NotChecked=0, Total=3660 [2022-02-10 03:48:17,278 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 293 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:17,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 175 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 750 Invalid, 0 Unknown, 57 Unchecked, 0.5s Time] [2022-02-10 03:48:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2022-02-10 03:48:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1344. [2022-02-10 03:48:17,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.2390171258376768) internal successors, (3007), 1343 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 3007 transitions. [2022-02-10 03:48:17,294 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 3007 transitions. Word has length 26 [2022-02-10 03:48:17,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:17,294 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 3007 transitions. [2022-02-10 03:48:17,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 3007 transitions. [2022-02-10 03:48:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:48:17,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:17,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:48:17,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:17,512 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 [2022-02-10 03:48:17,513 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1458190486, now seen corresponding path program 15 times [2022-02-10 03:48:17,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:17,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079869156] [2022-02-10 03:48:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:17,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:18,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:18,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079869156] [2022-02-10 03:48:18,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079869156] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:18,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898902846] [2022-02-10 03:48:18,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:48:18,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:18,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:18,142 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:18,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-10 03:48:18,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:48:18,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:18,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:48:18,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:19,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:48:19,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:48:19,163 INFO L387 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 109 treesize of output 83 [2022-02-10 03:48:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:21,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:24,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:48:24,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:48:24,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 343 treesize of output 269 [2022-02-10 03:48:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:35,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898902846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:35,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:35,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-02-10 03:48:35,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028981812] [2022-02-10 03:48:35,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:35,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:48:35,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:35,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:48:35,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:48:35,699 INFO L87 Difference]: Start difference. First operand 1344 states and 3007 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:42,709 INFO L93 Difference]: Finished difference Result 2235 states and 4650 transitions. [2022-02-10 03:48:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-10 03:48:42,709 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:48:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:42,712 INFO L225 Difference]: With dead ends: 2235 [2022-02-10 03:48:42,713 INFO L226 Difference]: Without dead ends: 2223 [2022-02-10 03:48:42,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1005, Invalid=4695, Unknown=0, NotChecked=0, Total=5700 [2022-02-10 03:48:42,713 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 403 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:42,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 265 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-10 03:48:42,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2022-02-10 03:48:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1350. [2022-02-10 03:48:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 2.236471460340993) internal successors, (3017), 1349 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 3017 transitions. [2022-02-10 03:48:42,732 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 3017 transitions. Word has length 26 [2022-02-10 03:48:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:42,733 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 3017 transitions. [2022-02-10 03:48:42,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 3017 transitions. [2022-02-10 03:48:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:48:42,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:42,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:48:42,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-10 03:48:42,953 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 [2022-02-10 03:48:42,953 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:42,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:42,953 INFO L85 PathProgramCache]: Analyzing trace with hash 302137114, now seen corresponding path program 16 times [2022-02-10 03:48:42,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:42,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242134353] [2022-02-10 03:48:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:42,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:43,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:43,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242134353] [2022-02-10 03:48:43,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242134353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:43,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313735329] [2022-02-10 03:48:43,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:48:43,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:43,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:43,375 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:43,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-10 03:48:43,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:48:43,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:43,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:48:43,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:48:43,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:48:43,781 INFO L387 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 109 treesize of output 83 [2022-02-10 03:48:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:44,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:45,199 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:48:45,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 269 [2022-02-10 03:48:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:51,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313735329] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:51,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:51,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:48:51,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412822555] [2022-02-10 03:48:51,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:51,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:48:51,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:51,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:48:51,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:48:51,138 INFO L87 Difference]: Start difference. First operand 1350 states and 3017 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:53,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:53,055 INFO L93 Difference]: Finished difference Result 1758 states and 3741 transitions. [2022-02-10 03:48:53,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:48:53,055 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:48:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:53,058 INFO L225 Difference]: With dead ends: 1758 [2022-02-10 03:48:53,058 INFO L226 Difference]: Without dead ends: 1746 [2022-02-10 03:48:53,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:48:53,059 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 178 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:53,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 218 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 524 Invalid, 0 Unknown, 21 Unchecked, 0.4s Time] [2022-02-10 03:48:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-02-10 03:48:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1350. [2022-02-10 03:48:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 2.236471460340993) internal successors, (3017), 1349 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 3017 transitions. [2022-02-10 03:48:53,076 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 3017 transitions. Word has length 26 [2022-02-10 03:48:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:53,076 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 3017 transitions. [2022-02-10 03:48:53,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 3017 transitions. [2022-02-10 03:48:53,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:48:53,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:53,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:48:53,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:53,294 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 [2022-02-10 03:48:53,294 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:53,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:53,294 INFO L85 PathProgramCache]: Analyzing trace with hash -188218022, now seen corresponding path program 17 times [2022-02-10 03:48:53,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:53,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780665032] [2022-02-10 03:48:53,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:53,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:53,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:53,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780665032] [2022-02-10 03:48:53,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780665032] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:53,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017396979] [2022-02-10 03:48:53,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:48:53,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:53,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:53,882 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:53,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-10 03:48:53,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:48:53,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:53,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:48:53,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:54,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:48:54,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:48:54,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:48:54,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:48:54,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 75 [2022-02-10 03:48:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:54,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:55,766 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:48:55,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-02-10 03:48:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:57,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017396979] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:57,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:57,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-02-10 03:48:57,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462076145] [2022-02-10 03:48:57,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:57,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:48:57,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:48:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:48:57,163 INFO L87 Difference]: Start difference. First operand 1350 states and 3017 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:59,346 INFO L93 Difference]: Finished difference Result 1755 states and 3861 transitions. [2022-02-10 03:48:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:48:59,346 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:48:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:59,349 INFO L225 Difference]: With dead ends: 1755 [2022-02-10 03:48:59,349 INFO L226 Difference]: Without dead ends: 1743 [2022-02-10 03:48:59,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=439, Invalid=2531, Unknown=0, NotChecked=0, Total=2970 [2022-02-10 03:48:59,350 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 192 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:59,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 183 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:48:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-02-10 03:48:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1353. [2022-02-10 03:48:59,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 2.2366863905325443) internal successors, (3024), 1352 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 3024 transitions. [2022-02-10 03:48:59,369 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 3024 transitions. Word has length 26 [2022-02-10 03:48:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:59,369 INFO L470 AbstractCegarLoop]: Abstraction has 1353 states and 3024 transitions. [2022-02-10 03:48:59,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 3024 transitions. [2022-02-10 03:48:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:48:59,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:59,371 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:48:59,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:59,579 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 [2022-02-10 03:48:59,579 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:59,580 INFO L85 PathProgramCache]: Analyzing trace with hash -585222294, now seen corresponding path program 18 times [2022-02-10 03:48:59,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:59,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285502385] [2022-02-10 03:48:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:59,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:59,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:59,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285502385] [2022-02-10 03:48:59,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285502385] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:59,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570417802] [2022-02-10 03:48:59,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:48:59,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:59,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:59,956 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:59,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-10 03:48:59,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:48:59,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:59,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:48:59,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:49:00,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:49:00,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:49:00,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:49:00,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:49:00,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 103 [2022-02-10 03:49:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:01,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:49:02,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:49:02,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:49:02,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:49:02,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:49:02,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 375 treesize of output 247 [2022-02-10 03:49:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:03,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570417802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:49:03,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:49:03,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-10 03:49:03,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901232928] [2022-02-10 03:49:03,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:49:03,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:49:03,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:49:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:49:03,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:49:03,457 INFO L87 Difference]: Start difference. First operand 1353 states and 3024 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:09,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:49:09,793 INFO L93 Difference]: Finished difference Result 1891 states and 4065 transitions. [2022-02-10 03:49:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-10 03:49:09,794 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:49:09,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:49:09,796 INFO L225 Difference]: With dead ends: 1891 [2022-02-10 03:49:09,797 INFO L226 Difference]: Without dead ends: 1858 [2022-02-10 03:49:09,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=824, Invalid=4006, Unknown=0, NotChecked=0, Total=4830 [2022-02-10 03:49:09,797 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 244 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-10 03:49:09,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 249 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-10 03:49:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-02-10 03:49:09,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1367. [2022-02-10 03:49:09,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 2.234260614934114) internal successors, (3052), 1366 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 3052 transitions. [2022-02-10 03:49:09,817 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 3052 transitions. Word has length 26 [2022-02-10 03:49:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:49:09,817 INFO L470 AbstractCegarLoop]: Abstraction has 1367 states and 3052 transitions. [2022-02-10 03:49:09,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 3052 transitions. [2022-02-10 03:49:09,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:49:09,818 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:49:09,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:49:09,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-10 03:49:10,031 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 [2022-02-10 03:49:10,031 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:49:10,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:49:10,032 INFO L85 PathProgramCache]: Analyzing trace with hash -915805738, now seen corresponding path program 17 times [2022-02-10 03:49:10,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:49:10,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456654637] [2022-02-10 03:49:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:49:10,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:49:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:49:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:10,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:49:10,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456654637] [2022-02-10 03:49:10,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456654637] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:49:10,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310676995] [2022-02-10 03:49:10,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:49:10,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:49:10,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:49:10,362 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:49:10,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-10 03:49:10,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:49:10,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:49:10,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:49:10,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:49:10,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:49:10,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:49:10,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-10 03:49:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:11,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:49:11,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:49:11,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:49:11,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 335 treesize of output 269 [2022-02-10 03:49:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:53,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310676995] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:49:53,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:49:53,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-10 03:49:53,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043352730] [2022-02-10 03:49:53,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:49:53,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:49:53,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:49:53,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:49:53,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:49:53,446 INFO L87 Difference]: Start difference. First operand 1367 states and 3052 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:50:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:50:00,753 INFO L93 Difference]: Finished difference Result 2027 states and 4209 transitions. [2022-02-10 03:50:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-10 03:50:00,753 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:50:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:50:00,756 INFO L225 Difference]: With dead ends: 2027 [2022-02-10 03:50:00,756 INFO L226 Difference]: Without dead ends: 2005 [2022-02-10 03:50:00,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2593 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1162, Invalid=7210, Unknown=0, NotChecked=0, Total=8372 [2022-02-10 03:50:00,757 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 310 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:50:00,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 238 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-10 03:50:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2022-02-10 03:50:00,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1428. [2022-02-10 03:50:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.222144358794674) internal successors, (3171), 1427 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:50:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3171 transitions. [2022-02-10 03:50:00,776 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3171 transitions. Word has length 26 [2022-02-10 03:50:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:50:00,776 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 3171 transitions. [2022-02-10 03:50:00,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:50:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3171 transitions. [2022-02-10 03:50:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:50:00,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:50:00,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:50:00,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-10 03:50:00,994 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 [2022-02-10 03:50:00,995 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:50:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:50:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash -306479974, now seen corresponding path program 18 times [2022-02-10 03:50:00,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:50:00,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622719979] [2022-02-10 03:50:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:50:00,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:50:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:50:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:01,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:50:01,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622719979] [2022-02-10 03:50:01,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622719979] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:50:01,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344154384] [2022-02-10 03:50:01,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:50:01,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:50:01,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:50:01,259 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:50:01,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-10 03:50:01,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:50:01,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:50:01,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:50:01,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:50:01,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:50:01,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:50:01,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 117 [2022-02-10 03:50:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:03,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:50:04,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:50:04,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:50:04,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:50:04,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 327 treesize of output 253 [2022-02-10 03:50:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:07,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344154384] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:50:07,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:50:07,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-02-10 03:50:07,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339976665] [2022-02-10 03:50:07,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:50:07,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:50:07,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:50:07,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:50:07,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:50:07,751 INFO L87 Difference]: Start difference. First operand 1428 states and 3171 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:50:11,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:50:11,217 INFO L93 Difference]: Finished difference Result 1939 states and 4065 transitions. [2022-02-10 03:50:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:50:11,218 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:50:11,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:50:11,221 INFO L225 Difference]: With dead ends: 1939 [2022-02-10 03:50:11,221 INFO L226 Difference]: Without dead ends: 1933 [2022-02-10 03:50:11,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=464, Invalid=1986, Unknown=0, NotChecked=0, Total=2450 [2022-02-10 03:50:11,221 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 320 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:50:11,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 174 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 03:50:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2022-02-10 03:50:11,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1428. [2022-02-10 03:50:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.222144358794674) internal successors, (3171), 1427 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:50:11,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3171 transitions. [2022-02-10 03:50:11,241 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3171 transitions. Word has length 26 [2022-02-10 03:50:11,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:50:11,241 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 3171 transitions. [2022-02-10 03:50:11,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:50:11,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3171 transitions. [2022-02-10 03:50:11,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:50:11,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:50:11,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:50:11,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-10 03:50:11,459 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 [2022-02-10 03:50:11,459 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:50:11,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:50:11,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1787735454, now seen corresponding path program 19 times [2022-02-10 03:50:11,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:50:11,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916476567] [2022-02-10 03:50:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:50:11,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:50:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:50:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:11,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:50:11,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916476567] [2022-02-10 03:50:11,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916476567] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:50:11,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203289229] [2022-02-10 03:50:11,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:50:11,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:50:11,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:50:11,776 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:50:11,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-10 03:50:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:50:11,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:50:11,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:50:12,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:50:12,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:50:12,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 65 [2022-02-10 03:50:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:12,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:50:13,302 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:50:13,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 339 treesize of output 261 [2022-02-10 03:51:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:51:22,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203289229] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:51:22,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:51:22,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:51:22,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550507859] [2022-02-10 03:51:22,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:51:22,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:51:22,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:51:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:51:22,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:51:22,596 INFO L87 Difference]: Start difference. First operand 1428 states and 3171 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:51:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:51:25,871 INFO L93 Difference]: Finished difference Result 1942 states and 4168 transitions. [2022-02-10 03:51:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:51:25,872 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:51:25,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:51:25,875 INFO L225 Difference]: With dead ends: 1942 [2022-02-10 03:51:25,875 INFO L226 Difference]: Without dead ends: 1926 [2022-02-10 03:51:25,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=431, Invalid=2119, Unknown=0, NotChecked=0, Total=2550 [2022-02-10 03:51:25,876 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 204 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:51:25,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 148 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 606 Invalid, 0 Unknown, 47 Unchecked, 0.4s Time] [2022-02-10 03:51:25,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2022-02-10 03:51:25,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1428. [2022-02-10 03:51:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.2214435879467413) internal successors, (3170), 1427 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:51:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3170 transitions. [2022-02-10 03:51:25,894 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3170 transitions. Word has length 26 [2022-02-10 03:51:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:51:25,894 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 3170 transitions. [2022-02-10 03:51:25,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:51:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3170 transitions. [2022-02-10 03:51:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:51:25,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:51:25,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:51:25,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-10 03:51:26,112 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 [2022-02-10 03:51:26,113 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:51:26,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:51:26,113 INFO L85 PathProgramCache]: Analyzing trace with hash -162675810, now seen corresponding path program 20 times [2022-02-10 03:51:26,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:51:26,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148053421] [2022-02-10 03:51:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:51:26,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:51:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:51:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:51:26,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:51:26,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148053421] [2022-02-10 03:51:26,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148053421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:51:26,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775240229] [2022-02-10 03:51:26,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:51:26,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:51:26,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:51:26,430 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:51:26,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:51:26,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:51:26,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-10 03:51:26,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:51:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:51:26,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:51:26,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:51:26,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 82 [2022-02-10 03:51:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:51:28,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:51:35,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:51:35,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 307 treesize of output 265 [2022-02-10 03:53:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:46,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775240229] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:53:46,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:53:46,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-10 03:53:46,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312714790] [2022-02-10 03:53:46,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:53:46,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:53:46,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:53:46,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:53:46,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:53:46,119 INFO L87 Difference]: Start difference. First operand 1428 states and 3170 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:53:47,905 INFO L93 Difference]: Finished difference Result 1758 states and 3771 transitions. [2022-02-10 03:53:47,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:53:47,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:53:47,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:53:47,908 INFO L225 Difference]: With dead ends: 1758 [2022-02-10 03:53:47,908 INFO L226 Difference]: Without dead ends: 1746 [2022-02-10 03:53:47,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 03:53:47,908 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 193 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:53:47,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 105 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 345 Invalid, 0 Unknown, 295 Unchecked, 0.2s Time] [2022-02-10 03:53:47,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-02-10 03:53:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1442. [2022-02-10 03:53:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.219292158223456) internal successors, (3198), 1441 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 3198 transitions. [2022-02-10 03:53:47,925 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 3198 transitions. Word has length 26 [2022-02-10 03:53:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:53:47,926 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 3198 transitions. [2022-02-10 03:53:47,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 3198 transitions. [2022-02-10 03:53:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:53:47,928 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:53:47,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:53:47,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-02-10 03:53:48,142 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 [2022-02-10 03:53:48,142 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:53:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:53:48,143 INFO L85 PathProgramCache]: Analyzing trace with hash 870573974, now seen corresponding path program 21 times [2022-02-10 03:53:48,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:53:48,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825406216] [2022-02-10 03:53:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:53:48,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:53:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:53:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:48,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:53:48,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825406216] [2022-02-10 03:53:48,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825406216] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:53:48,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540909654] [2022-02-10 03:53:48,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:53:48,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:53:48,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:53:48,489 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:53:48,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-10 03:53:48,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:53:48,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:53:48,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:53:48,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:53:49,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:53:49,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:53:50,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:53:50,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-10 03:53:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:50,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:53:52,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:53:52,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 273 [2022-02-10 03:54:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:54:46,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540909654] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:54:46,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:54:46,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:54:46,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528410215] [2022-02-10 03:54:46,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:54:46,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:54:46,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:54:46,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:54:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:54:46,092 INFO L87 Difference]: Start difference. First operand 1442 states and 3198 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:54:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:54:47,542 INFO L93 Difference]: Finished difference Result 1688 states and 3672 transitions. [2022-02-10 03:54:47,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:54:47,542 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:54:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:54:47,545 INFO L225 Difference]: With dead ends: 1688 [2022-02-10 03:54:47,545 INFO L226 Difference]: Without dead ends: 1678 [2022-02-10 03:54:47,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:54:47,545 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 138 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:54:47,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 109 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 246 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2022-02-10 03:54:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2022-02-10 03:54:47,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1442. [2022-02-10 03:54:47,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.219292158223456) internal successors, (3198), 1441 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:54:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 3198 transitions. [2022-02-10 03:54:47,561 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 3198 transitions. Word has length 26 [2022-02-10 03:54:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:54:47,561 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 3198 transitions. [2022-02-10 03:54:47,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:54:47,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 3198 transitions. [2022-02-10 03:54:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:54:47,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:54:47,563 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:54:47,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-10 03:54:47,779 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 [2022-02-10 03:54:47,779 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:54:47,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:54:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash 483673174, now seen corresponding path program 22 times [2022-02-10 03:54:47,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:54:47,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967778106] [2022-02-10 03:54:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:54:47,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:54:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:54:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:54:48,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:54:48,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967778106] [2022-02-10 03:54:48,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967778106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:54:48,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326163145] [2022-02-10 03:54:48,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:54:48,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:54:48,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:54:48,166 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:54:48,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-10 03:54:48,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:54:48,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:54:48,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:54:48,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:54:48,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:54:48,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:54:48,621 INFO L387 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 109 treesize of output 83 [2022-02-10 03:54:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:54:49,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:54:50,361 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:54:50,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 327 treesize of output 261 [2022-02-10 03:55:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:55:15,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326163145] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:55:15,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:55:15,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-10 03:55:15,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670599871] [2022-02-10 03:55:15,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:55:15,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:55:15,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:55:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:55:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:55:15,193 INFO L87 Difference]: Start difference. First operand 1442 states and 3198 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:55:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:55:16,327 INFO L93 Difference]: Finished difference Result 1819 states and 3897 transitions. [2022-02-10 03:55:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:55:16,327 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:55:16,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:55:16,330 INFO L225 Difference]: With dead ends: 1819 [2022-02-10 03:55:16,330 INFO L226 Difference]: Without dead ends: 1812 [2022-02-10 03:55:16,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:55:16,331 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 121 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:55:16,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 297 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:55:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-02-10 03:55:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1455. [2022-02-10 03:55:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 2.2193947730398897) internal successors, (3227), 1454 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:55:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 3227 transitions. [2022-02-10 03:55:16,358 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 3227 transitions. Word has length 26 [2022-02-10 03:55:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:55:16,359 INFO L470 AbstractCegarLoop]: Abstraction has 1455 states and 3227 transitions. [2022-02-10 03:55:16,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:55:16,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 3227 transitions. [2022-02-10 03:55:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:55:16,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:55:16,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:55:16,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-10 03:55:16,564 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 [2022-02-10 03:55:16,564 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:55:16,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:55:16,564 INFO L85 PathProgramCache]: Analyzing trace with hash -285479398, now seen corresponding path program 23 times [2022-02-10 03:55:16,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:55:16,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484056823] [2022-02-10 03:55:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:55:16,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:55:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:55:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:55:17,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:55:17,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484056823] [2022-02-10 03:55:17,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484056823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:55:17,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219044741] [2022-02-10 03:55:17,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:55:17,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:55:17,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:55:17,081 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:55:17,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-10 03:55:17,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:55:17,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:55:17,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:55:17,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:55:17,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:55:17,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:55:17,511 INFO L387 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 89 treesize of output 73 [2022-02-10 03:55:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:55:18,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:55:19,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:55:19,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:55:19,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 459 treesize of output 333 [2022-02-10 03:56:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:56:09,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219044741] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:56:09,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:56:09,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-10 03:56:09,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133725994] [2022-02-10 03:56:09,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:56:09,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:56:09,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:56:09,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:56:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:56:09,035 INFO L87 Difference]: Start difference. First operand 1455 states and 3227 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:56:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:56:13,086 INFO L93 Difference]: Finished difference Result 1905 states and 4085 transitions. [2022-02-10 03:56:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-10 03:56:13,086 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:56:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:56:13,089 INFO L225 Difference]: With dead ends: 1905 [2022-02-10 03:56:13,089 INFO L226 Difference]: Without dead ends: 1895 [2022-02-10 03:56:13,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=605, Invalid=3177, Unknown=0, NotChecked=0, Total=3782 [2022-02-10 03:56:13,089 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 189 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:56:13,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 190 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 581 Invalid, 0 Unknown, 266 Unchecked, 0.4s Time] [2022-02-10 03:56:13,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2022-02-10 03:56:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1467. [2022-02-10 03:56:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 2.227148703956344) internal successors, (3265), 1466 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:56:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 3265 transitions. [2022-02-10 03:56:13,112 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 3265 transitions. Word has length 26 [2022-02-10 03:56:13,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:56:13,112 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 3265 transitions. [2022-02-10 03:56:13,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:56:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 3265 transitions. [2022-02-10 03:56:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:56:13,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:56:13,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:56:13,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-10 03:56:13,329 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 [2022-02-10 03:56:13,330 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:56:13,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:56:13,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1206269730, now seen corresponding path program 24 times [2022-02-10 03:56:13,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:56:13,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399345831] [2022-02-10 03:56:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:56:13,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:56:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:56:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:56:13,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:56:13,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399345831] [2022-02-10 03:56:13,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399345831] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:56:13,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613470375] [2022-02-10 03:56:13,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:56:13,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:56:13,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:56:13,816 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:56:13,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-10 03:56:13,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:56:13,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:56:13,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:56:13,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:56:14,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:56:14,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:56:14,174 INFO L387 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 89 treesize of output 73 [2022-02-10 03:56:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:56:14,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:56:15,983 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:56:15,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 459 treesize of output 333 [2022-02-10 03:56:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:56:41,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613470375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:56:41,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:56:41,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:56:41,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823944158] [2022-02-10 03:56:41,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:56:41,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:56:41,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:56:41,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:56:41,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:56:41,856 INFO L87 Difference]: Start difference. First operand 1467 states and 3265 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:56:43,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:56:43,507 INFO L93 Difference]: Finished difference Result 1869 states and 4021 transitions. [2022-02-10 03:56:43,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:56:43,508 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:56:43,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:56:43,510 INFO L225 Difference]: With dead ends: 1869 [2022-02-10 03:56:43,510 INFO L226 Difference]: Without dead ends: 1860 [2022-02-10 03:56:43,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:56:43,511 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 115 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:56:43,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 194 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 459 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2022-02-10 03:56:43,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-02-10 03:56:43,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1471. [2022-02-10 03:56:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.227891156462585) internal successors, (3275), 1470 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:56:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3275 transitions. [2022-02-10 03:56:43,527 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3275 transitions. Word has length 26 [2022-02-10 03:56:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:56:43,528 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3275 transitions. [2022-02-10 03:56:43,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:56:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3275 transitions. [2022-02-10 03:56:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:56:43,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:56:43,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:56:43,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-10 03:56:43,739 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 [2022-02-10 03:56:43,739 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:56:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:56:43,740 INFO L85 PathProgramCache]: Analyzing trace with hash -755801834, now seen corresponding path program 25 times [2022-02-10 03:56:43,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:56:43,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585891750] [2022-02-10 03:56:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:56:43,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:56:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:56:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:56:44,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:56:44,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585891750] [2022-02-10 03:56:44,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585891750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:56:44,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029612850] [2022-02-10 03:56:44,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:56:44,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:56:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:56:44,111 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:56:44,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-10 03:56:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:56:44,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:56:44,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:56:44,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:56:44,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:56:44,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 65 [2022-02-10 03:56:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:56:45,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:56:46,145 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:56:46,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 459 treesize of output 333 Received shutdown request... [2022-02-10 03:57:35,052 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-10 03:57:35,057 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-10 03:57:35,058 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-10 03:57:35,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-10 03:57:35,087 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-10 03:57:35,259 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 [2022-02-10 03:57:35,259 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 13ms.. [2022-02-10 03:57:35,261 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-10 03:57:35,261 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-10 03:57:35,261 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-10 03:57:35,262 INFO L732 BasicCegarLoop]: Path program histogram: [25, 18, 1, 1, 1] [2022-02-10 03:57:35,264 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-10 03:57:35,264 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-10 03:57:35,265 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 03:57:35 BasicIcfg [2022-02-10 03:57:35,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-10 03:57:35,265 INFO L158 Benchmark]: Toolchain (without parser) took 859587.83ms. Allocated memory was 178.3MB in the beginning and 5.6GB in the end (delta: 5.4GB). Free memory was 135.3MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 3.4GB. Max. memory is 8.0GB. [2022-02-10 03:57:35,265 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.73ms. Allocated memory is still 178.3MB. Free memory was 136.5MB in the beginning and 136.4MB in the end (delta: 141.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 03:57:35,265 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.07ms. Allocated memory is still 178.3MB. Free memory was 135.2MB in the beginning and 133.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 03:57:35,265 INFO L158 Benchmark]: Boogie Preprocessor took 10.90ms. Allocated memory is still 178.3MB. Free memory was 133.6MB in the beginning and 132.8MB in the end (delta: 864.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 03:57:35,265 INFO L158 Benchmark]: RCFGBuilder took 220.49ms. Allocated memory is still 178.3MB. Free memory was 132.6MB in the beginning and 123.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-10 03:57:35,265 INFO L158 Benchmark]: TraceAbstraction took 859333.92ms. Allocated memory was 178.3MB in the beginning and 5.6GB in the end (delta: 5.4GB). Free memory was 122.7MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 3.3GB. Max. memory is 8.0GB. [2022-02-10 03:57:35,266 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 0.73ms. Allocated memory is still 178.3MB. Free memory was 136.5MB in the beginning and 136.4MB in the end (delta: 141.4kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.07ms. Allocated memory is still 178.3MB. Free memory was 135.2MB in the beginning and 133.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.90ms. Allocated memory is still 178.3MB. Free memory was 133.6MB in the beginning and 132.8MB in the end (delta: 864.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 220.49ms. Allocated memory is still 178.3MB. Free memory was 132.6MB in the beginning and 123.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 859333.92ms. Allocated memory was 178.3MB in the beginning and 5.6GB in the end (delta: 5.4GB). Free memory was 122.7MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 3.3GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 13ms.. - 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 analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 13ms.. - 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 analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 13ms.. - 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 analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 13ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 859.2s, OverallIterations: 46, TraceHistogramMax: 2, PathProgramHistogramMax: 25, EmptinessCheckTime: 1.4s, AutomataDifference: 162.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.7s, PartialOrderReductionTime: 5.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9594 SdHoareTripleChecker+Valid, 18.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9594 mSDsluCounter, 7340 SdHoareTripleChecker+Invalid, 15.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2203 IncrementalHoareTripleChecker+Unchecked, 9903 mSDsCounter, 2254 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 28592 IncrementalHoareTripleChecker+Invalid, 33049 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2254 mSolverCounterUnsat, 826 mSDtfsCounter, 28592 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3751 GetRequests, 1546 SyntacticMatches, 97 SemanticMatches, 2108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42850 ImplicationChecksByTransitivity, 159.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183322occurred in iteration=0, InterpolantAutomatonStates: 1581, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 45 MinimizatonAttempts, 75128 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 626.4s InterpolantComputationTime, 2166 NumberOfCodeBlocks, 2162 NumberOfCodeBlocksAsserted, 136 NumberOfCheckSat, 3091 ConstructedInterpolants, 38 QuantifiedInterpolants, 107405 SizeOfPredicates, 525 NumberOfNonLiveVariables, 2751 ConjunctsInSsa, 852 ConjunctsInUnsatCore, 129 InterpolantComputations, 3 PerfectInterpolantSequences, 92/695 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