/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 14:38:00,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 14:38:00,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 14:38:00,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-15 14:38:00,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-15 14:38:00,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-15 14:38:00,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-15 14:38:00,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-15 14:38:00,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-15 14:38:00,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-15 14:38:00,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-15 14:38:00,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-15 14:38:00,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 14:38:00,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 14:38:00,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 14:38:00,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 14:38:00,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 14:38:00,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 14:38:00,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 14:38:00,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 14:38:00,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 14:38:00,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 14:38:00,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 14:38:00,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 14:38:00,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-15 14:38:00,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-15 14:38:00,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-15 14:38:00,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-15 14:38:00,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-15 14:38:00,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-15 14:38:00,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-15 14:38:00,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-15 14:38:00,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-15 14:38:00,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-15 14:38:00,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-15 14:38:00,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-15 14:38:00,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-15 14:38:00,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-15 14:38:00,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 14:38:00,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 14:38:00,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 14:38:00,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-15 14:38:00,464 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 14:38:00,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 14:38:00,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 14:38:00,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 14:38:00,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 14:38:00,465 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 14:38:00,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 14:38:00,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 14:38:00,466 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 14:38:00,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 14:38:00,466 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 14:38:00,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 14:38:00,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 14:38:00,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 14:38:00,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 14:38:00,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 14:38:00,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 14:38:00,478 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 14:38:00,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 14:38:00,479 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 14:38:00,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 14:38:00,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 14:38:00,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 14:38:00,479 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 14:38:00,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 14:38:00,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:38:00,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 14:38:00,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 14:38:00,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 14:38:00,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 14:38:00,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 14:38:00,481 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 14:38:00,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 14:38:00,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 14:38:00,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 14:38:00,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 14:38:00,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 14:38:00,732 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 14:38:00,733 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 14:38:00,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl [2022-02-15 14:38:00,735 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl' [2022-02-15 14:38:00,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 14:38:00,757 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 14:38:00,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 14:38:00,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 14:38:00,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 14:38:00,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:00" (1/1) ... [2022-02-15 14:38:00,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:00" (1/1) ... [2022-02-15 14:38:00,784 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 14:38:00,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 14:38:00,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 14:38:00,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 14:38:00,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 14:38:00,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:00" (1/1) ... [2022-02-15 14:38:00,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:00" (1/1) ... [2022-02-15 14:38:00,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:00" (1/1) ... [2022-02-15 14:38:00,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:00" (1/1) ... [2022-02-15 14:38:00,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:00" (1/1) ... [2022-02-15 14:38:00,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:00" (1/1) ... [2022-02-15 14:38:00,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:00" (1/1) ... [2022-02-15 14:38:00,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 14:38:00,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 14:38:00,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 14:38:00,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 14:38:00,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:00" (1/1) ... [2022-02-15 14:38:00,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:38:00,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:00,841 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) [2022-02-15 14:38:00,852 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 [2022-02-15 14:38:00,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 14:38:00,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 14:38:00,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 14:38:00,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 14:38:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 14:38:00,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 14:38:00,884 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 14:38:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 14:38:00,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 14:38:00,885 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 14:38:00,933 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 14:38:00,934 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 14:38:01,050 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 14:38:01,074 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 14:38:01,074 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-15 14:38:01,076 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:38:01 BoogieIcfgContainer [2022-02-15 14:38:01,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 14:38:01,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 14:38:01,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 14:38:01,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 14:38:01,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:38:00" (1/2) ... [2022-02-15 14:38:01,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323f5ecb and model type queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:38:01, skipping insertion in model container [2022-02-15 14:38:01,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:38:01" (2/2) ... [2022-02-15 14:38:01,096 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2-nl.wvr.bpl [2022-02-15 14:38:01,101 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 14:38:01,101 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 14:38:01,101 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 14:38:01,101 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 14:38:01,128 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-15 14:38:01,163 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 14:38:01,176 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 [2022-02-15 14:38:01,177 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-15 14:38:01,193 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 29 transitions, 74 flow [2022-02-15 14:38:01,224 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 14:38:01,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:01,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:01,238 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1778097953, now seen corresponding path program 1 times [2022-02-15 14:38:01,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:01,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814825741] [2022-02-15 14:38:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:01,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:01,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:01,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814825741] [2022-02-15 14:38:01,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814825741] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:38:01,375 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:38:01,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 14:38:01,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175225291] [2022-02-15 14:38:01,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:38:01,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 14:38:01,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:01,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 14:38:01,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:38:01,408 INFO L87 Difference]: Start difference. First operand has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:01,465 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2022-02-15 14:38:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:38:01,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 14:38:01,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:01,477 INFO L225 Difference]: With dead ends: 114 [2022-02-15 14:38:01,477 INFO L226 Difference]: Without dead ends: 114 [2022-02-15 14:38:01,478 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 [2022-02-15 14:38:01,482 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:01,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:38:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-15 14:38:01,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-02-15 14:38:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2022-02-15 14:38:01,528 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 16 [2022-02-15 14:38:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:01,528 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2022-02-15 14:38:01,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:01,529 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2022-02-15 14:38:01,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:38:01,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:01,540 INFO 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] [2022-02-15 14:38:01,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 14:38:01,540 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:01,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:01,541 INFO L85 PathProgramCache]: Analyzing trace with hash -327311045, now seen corresponding path program 1 times [2022-02-15 14:38:01,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:01,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193618769] [2022-02-15 14:38:01,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:01,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:02,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:02,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193618769] [2022-02-15 14:38:02,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193618769] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:02,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428919502] [2022-02-15 14:38:02,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:02,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:02,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:02,027 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) [2022-02-15 14:38:02,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-15 14:38:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:02,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 14:38:02,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:02,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:02,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428919502] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:02,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:02,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-15 14:38:02,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764763487] [2022-02-15 14:38:02,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:02,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:38:02,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:02,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:38:02,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:38:02,930 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:03,744 INFO L93 Difference]: Finished difference Result 299 states and 565 transitions. [2022-02-15 14:38:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 14:38:03,744 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:38:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:03,747 INFO L225 Difference]: With dead ends: 299 [2022-02-15 14:38:03,747 INFO L226 Difference]: Without dead ends: 292 [2022-02-15 14:38:03,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:38:03,749 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 176 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:03,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 249 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:38:03,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-15 14:38:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 153. [2022-02-15 14:38:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.9407894736842106) internal successors, (295), 152 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 295 transitions. [2022-02-15 14:38:03,783 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 295 transitions. Word has length 21 [2022-02-15 14:38:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:03,783 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 295 transitions. [2022-02-15 14:38:03,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:03,784 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 295 transitions. [2022-02-15 14:38:03,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:38:03,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:03,785 INFO 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] [2022-02-15 14:38:03,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:03,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:04,000 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash -411096687, now seen corresponding path program 2 times [2022-02-15 14:38:04,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:04,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673680491] [2022-02-15 14:38:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:04,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:04,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:04,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673680491] [2022-02-15 14:38:04,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673680491] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:04,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886803491] [2022-02-15 14:38:04,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:38:04,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:04,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:04,257 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) [2022-02-15 14:38:04,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-15 14:38:04,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:38:04,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:04,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-15 14:38:04,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:04,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:04,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886803491] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:04,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:04,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-02-15 14:38:04,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284838499] [2022-02-15 14:38:04,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:04,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 14:38:04,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:04,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 14:38:04,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-02-15 14:38:04,956 INFO L87 Difference]: Start difference. First operand 153 states and 295 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:05,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:05,801 INFO L93 Difference]: Finished difference Result 275 states and 526 transitions. [2022-02-15 14:38:05,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 14:38:05,802 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:38:05,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:05,805 INFO L225 Difference]: With dead ends: 275 [2022-02-15 14:38:05,805 INFO L226 Difference]: Without dead ends: 264 [2022-02-15 14:38:05,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:38:05,812 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 143 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:05,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 229 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:38:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-15 14:38:05,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 157. [2022-02-15 14:38:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9423076923076923) internal successors, (303), 156 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 303 transitions. [2022-02-15 14:38:05,833 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 303 transitions. Word has length 21 [2022-02-15 14:38:05,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:05,833 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 303 transitions. [2022-02-15 14:38:05,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:05,833 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 303 transitions. [2022-02-15 14:38:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:38:05,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:05,835 INFO 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] [2022-02-15 14:38:05,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:06,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-15 14:38:06,050 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:06,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:06,050 INFO L85 PathProgramCache]: Analyzing trace with hash 470969037, now seen corresponding path program 3 times [2022-02-15 14:38:06,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:06,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070406620] [2022-02-15 14:38:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:06,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:06,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:06,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070406620] [2022-02-15 14:38:06,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070406620] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:06,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465373027] [2022-02-15 14:38:06,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:38:06,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:06,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:06,266 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) [2022-02-15 14:38:06,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-15 14:38:06,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:38:06,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:06,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 14:38:06,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:06,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:06,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465373027] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:06,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:06,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-15 14:38:06,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093651354] [2022-02-15 14:38:06,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:06,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:38:06,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:38:06,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:38:06,834 INFO L87 Difference]: Start difference. First operand 157 states and 303 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:07,592 INFO L93 Difference]: Finished difference Result 232 states and 449 transitions. [2022-02-15 14:38:07,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 14:38:07,593 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:38:07,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:07,594 INFO L225 Difference]: With dead ends: 232 [2022-02-15 14:38:07,594 INFO L226 Difference]: Without dead ends: 225 [2022-02-15 14:38:07,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 14:38:07,596 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 171 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:07,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 146 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:38:07,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-15 14:38:07,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 155. [2022-02-15 14:38:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.9415584415584415) internal successors, (299), 154 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 299 transitions. [2022-02-15 14:38:07,605 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 299 transitions. Word has length 21 [2022-02-15 14:38:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:07,605 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 299 transitions. [2022-02-15 14:38:07,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:07,605 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 299 transitions. [2022-02-15 14:38:07,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:38:07,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:07,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:07,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:07,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:07,830 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:07,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:07,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1099615469, now seen corresponding path program 4 times [2022-02-15 14:38:07,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:07,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946892591] [2022-02-15 14:38:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:07,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:07,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:07,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946892591] [2022-02-15 14:38:07,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946892591] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:38:07,853 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:38:07,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-15 14:38:07,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940975763] [2022-02-15 14:38:07,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:38:07,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 14:38:07,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:07,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 14:38:07,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:38:07,854 INFO L87 Difference]: Start difference. First operand 155 states and 299 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:07,867 INFO L93 Difference]: Finished difference Result 157 states and 301 transitions. [2022-02-15 14:38:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 14:38:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:38:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:07,869 INFO L225 Difference]: With dead ends: 157 [2022-02-15 14:38:07,869 INFO L226 Difference]: Without dead ends: 157 [2022-02-15 14:38:07,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 14:38:07,870 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:07,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:38:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-02-15 14:38:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-02-15 14:38:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9294871794871795) internal successors, (301), 156 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 301 transitions. [2022-02-15 14:38:07,876 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 301 transitions. Word has length 21 [2022-02-15 14:38:07,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:07,876 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 301 transitions. [2022-02-15 14:38:07,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:07,877 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 301 transitions. [2022-02-15 14:38:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:38:07,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:07,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:07,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 14:38:07,878 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:07,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash 925568723, now seen corresponding path program 5 times [2022-02-15 14:38:07,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:07,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185582228] [2022-02-15 14:38:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:07,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:08,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:08,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185582228] [2022-02-15 14:38:08,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185582228] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:08,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506492741] [2022-02-15 14:38:08,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:38:08,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:08,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:08,056 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) [2022-02-15 14:38:08,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-15 14:38:08,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:38:08,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:08,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-15 14:38:08,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:08,269 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 11 treesize of output 7 [2022-02-15 14:38:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:08,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:08,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:08,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-02-15 14:38:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:08,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506492741] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:08,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:08,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-02-15 14:38:08,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283735786] [2022-02-15 14:38:08,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:08,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:38:08,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:08,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:38:08,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:38:08,785 INFO L87 Difference]: Start difference. First operand 157 states and 301 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:09,835 INFO L93 Difference]: Finished difference Result 278 states and 524 transitions. [2022-02-15 14:38:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:38:09,836 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:38:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:09,837 INFO L225 Difference]: With dead ends: 278 [2022-02-15 14:38:09,837 INFO L226 Difference]: Without dead ends: 269 [2022-02-15 14:38:09,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:38:09,839 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 118 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:09,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 397 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:38:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-15 14:38:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 168. [2022-02-15 14:38:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9401197604790419) internal successors, (324), 167 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 324 transitions. [2022-02-15 14:38:09,846 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 324 transitions. Word has length 21 [2022-02-15 14:38:09,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:09,846 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 324 transitions. [2022-02-15 14:38:09,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 324 transitions. [2022-02-15 14:38:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:38:09,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:09,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:09,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:10,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:10,062 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:10,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1018666131, now seen corresponding path program 6 times [2022-02-15 14:38:10,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:10,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850370207] [2022-02-15 14:38:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:10,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:10,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:10,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850370207] [2022-02-15 14:38:10,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850370207] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:10,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456033620] [2022-02-15 14:38:10,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:38:10,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:10,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:10,256 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) [2022-02-15 14:38:10,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-15 14:38:10,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:38:10,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:10,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 14:38:10,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:10,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:10,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456033620] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:10,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:10,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-15 14:38:10,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485687784] [2022-02-15 14:38:10,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:10,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 14:38:10,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 14:38:10,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:38:10,821 INFO L87 Difference]: Start difference. First operand 168 states and 324 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:11,476 INFO L93 Difference]: Finished difference Result 301 states and 564 transitions. [2022-02-15 14:38:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 14:38:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:38:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:11,481 INFO L225 Difference]: With dead ends: 301 [2022-02-15 14:38:11,482 INFO L226 Difference]: Without dead ends: 287 [2022-02-15 14:38:11,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 14:38:11,483 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 167 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:11,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 231 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:38:11,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-15 14:38:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 166. [2022-02-15 14:38:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.9393939393939394) internal successors, (320), 165 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 320 transitions. [2022-02-15 14:38:11,490 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 320 transitions. Word has length 21 [2022-02-15 14:38:11,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:11,490 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 320 transitions. [2022-02-15 14:38:11,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 320 transitions. [2022-02-15 14:38:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:38:11,492 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:11,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:11,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:11,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:11,715 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:11,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:11,715 INFO L85 PathProgramCache]: Analyzing trace with hash -96963991, now seen corresponding path program 7 times [2022-02-15 14:38:11,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:11,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56965154] [2022-02-15 14:38:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:11,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:11,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:11,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56965154] [2022-02-15 14:38:11,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56965154] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:11,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780459945] [2022-02-15 14:38:11,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:38:11,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:11,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:11,912 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) [2022-02-15 14:38:11,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-15 14:38:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:11,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 14:38:11,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:12,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:12,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780459945] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:12,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:12,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-02-15 14:38:12,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107706683] [2022-02-15 14:38:12,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:12,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:38:12,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:12,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:38:12,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:38:12,492 INFO L87 Difference]: Start difference. First operand 166 states and 320 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:13,135 INFO L93 Difference]: Finished difference Result 297 states and 558 transitions. [2022-02-15 14:38:13,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 14:38:13,139 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:38:13,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:13,141 INFO L225 Difference]: With dead ends: 297 [2022-02-15 14:38:13,141 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 14:38:13,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 14:38:13,142 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 164 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:13,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 214 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:38:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 14:38:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 160. [2022-02-15 14:38:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.9433962264150944) internal successors, (309), 159 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 309 transitions. [2022-02-15 14:38:13,147 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 309 transitions. Word has length 21 [2022-02-15 14:38:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:13,147 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 309 transitions. [2022-02-15 14:38:13,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 309 transitions. [2022-02-15 14:38:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:38:13,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:13,148 INFO 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] [2022-02-15 14:38:13,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:13,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:13,349 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:13,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash 585868805, now seen corresponding path program 8 times [2022-02-15 14:38:13,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:13,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131840380] [2022-02-15 14:38:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:13,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:13,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:13,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131840380] [2022-02-15 14:38:13,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131840380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:13,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844297340] [2022-02-15 14:38:13,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:38:13,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:13,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:13,534 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) [2022-02-15 14:38:13,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-15 14:38:13,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:38:13,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:13,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 14:38:13,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:13,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:14,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844297340] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:14,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:14,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-15 14:38:14,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320349475] [2022-02-15 14:38:14,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:14,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 14:38:14,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:14,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 14:38:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:38:14,087 INFO L87 Difference]: Start difference. First operand 160 states and 309 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:14,795 INFO L93 Difference]: Finished difference Result 274 states and 517 transitions. [2022-02-15 14:38:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 14:38:14,796 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:38:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:14,797 INFO L225 Difference]: With dead ends: 274 [2022-02-15 14:38:14,797 INFO L226 Difference]: Without dead ends: 265 [2022-02-15 14:38:14,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=1079, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:38:14,798 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 144 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:14,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 210 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:38:14,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-15 14:38:14,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 167. [2022-02-15 14:38:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.9457831325301205) internal successors, (323), 166 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 323 transitions. [2022-02-15 14:38:14,804 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 323 transitions. Word has length 21 [2022-02-15 14:38:14,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:14,804 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 323 transitions. [2022-02-15 14:38:14,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 323 transitions. [2022-02-15 14:38:14,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:38:14,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:14,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:14,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:15,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:15,028 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1467934529, now seen corresponding path program 9 times [2022-02-15 14:38:15,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:15,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219013596] [2022-02-15 14:38:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:15,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:15,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:15,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219013596] [2022-02-15 14:38:15,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219013596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:15,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841717239] [2022-02-15 14:38:15,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:38:15,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:15,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:15,204 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) [2022-02-15 14:38:15,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-15 14:38:15,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:38:15,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:15,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 14:38:15,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:15,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:15,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841717239] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:15,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:15,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-15 14:38:15,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649313524] [2022-02-15 14:38:15,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:15,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 14:38:15,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:15,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 14:38:15,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:38:15,728 INFO L87 Difference]: Start difference. First operand 167 states and 323 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:16,513 INFO L93 Difference]: Finished difference Result 234 states and 446 transitions. [2022-02-15 14:38:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 14:38:16,513 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:38:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:16,514 INFO L225 Difference]: With dead ends: 234 [2022-02-15 14:38:16,514 INFO L226 Difference]: Without dead ends: 227 [2022-02-15 14:38:16,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:38:16,515 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 152 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:16,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 165 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:38:16,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-15 14:38:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 165. [2022-02-15 14:38:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.9451219512195121) internal successors, (319), 164 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 319 transitions. [2022-02-15 14:38:16,520 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 319 transitions. Word has length 21 [2022-02-15 14:38:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:16,521 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 319 transitions. [2022-02-15 14:38:16,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:16,521 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 319 transitions. [2022-02-15 14:38:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:38:16,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:16,521 INFO 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] [2022-02-15 14:38:16,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:16,731 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,SelfDestructingSolverStorable9 [2022-02-15 14:38:16,732 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:16,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:16,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1358366049, now seen corresponding path program 10 times [2022-02-15 14:38:16,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:16,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777298228] [2022-02-15 14:38:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:16,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:16,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:16,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777298228] [2022-02-15 14:38:16,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777298228] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:16,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926141520] [2022-02-15 14:38:16,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:38:16,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:16,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:16,920 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) [2022-02-15 14:38:16,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-15 14:38:16,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:38:16,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:16,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 14:38:16,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:17,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:17,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926141520] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:17,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:17,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-02-15 14:38:17,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824011533] [2022-02-15 14:38:17,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:17,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:38:17,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:38:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:38:17,376 INFO L87 Difference]: Start difference. First operand 165 states and 319 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:18,022 INFO L93 Difference]: Finished difference Result 302 states and 566 transitions. [2022-02-15 14:38:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 14:38:18,022 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:38:18,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:18,024 INFO L225 Difference]: With dead ends: 302 [2022-02-15 14:38:18,024 INFO L226 Difference]: Without dead ends: 288 [2022-02-15 14:38:18,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2022-02-15 14:38:18,025 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 137 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:18,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 271 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 14:38:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-15 14:38:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 163. [2022-02-15 14:38:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.9444444444444444) internal successors, (315), 162 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 315 transitions. [2022-02-15 14:38:18,030 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 315 transitions. Word has length 21 [2022-02-15 14:38:18,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:18,030 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 315 transitions. [2022-02-15 14:38:18,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:18,030 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 315 transitions. [2022-02-15 14:38:18,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 14:38:18,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:18,031 INFO 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] [2022-02-15 14:38:18,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:18,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:18,232 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash -436663909, now seen corresponding path program 11 times [2022-02-15 14:38:18,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:18,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118994949] [2022-02-15 14:38:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:18,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:18,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:18,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118994949] [2022-02-15 14:38:18,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118994949] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:18,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142987119] [2022-02-15 14:38:18,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:38:18,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:18,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:18,429 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) [2022-02-15 14:38:18,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-15 14:38:18,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:38:18,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:18,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 14:38:18,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:18,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:18,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142987119] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:18,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:18,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-02-15 14:38:18,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674222237] [2022-02-15 14:38:18,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:18,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:38:18,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:18,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:38:18,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:38:18,941 INFO L87 Difference]: Start difference. First operand 163 states and 315 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:19,676 INFO L93 Difference]: Finished difference Result 312 states and 580 transitions. [2022-02-15 14:38:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 14:38:19,677 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 14:38:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:19,678 INFO L225 Difference]: With dead ends: 312 [2022-02-15 14:38:19,678 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 14:38:19,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:38:19,679 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 164 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:19,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 228 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 624 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-02-15 14:38:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 14:38:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 154. [2022-02-15 14:38:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.934640522875817) internal successors, (296), 153 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 296 transitions. [2022-02-15 14:38:19,686 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 296 transitions. Word has length 21 [2022-02-15 14:38:19,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:19,686 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 296 transitions. [2022-02-15 14:38:19,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:19,686 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 296 transitions. [2022-02-15 14:38:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 14:38:19,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:19,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:19,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:19,911 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,SelfDestructingSolverStorable11 [2022-02-15 14:38:19,912 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:19,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:19,912 INFO L85 PathProgramCache]: Analyzing trace with hash -457303751, now seen corresponding path program 1 times [2022-02-15 14:38:19,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:19,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152897840] [2022-02-15 14:38:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:19,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:19,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:19,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152897840] [2022-02-15 14:38:19,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152897840] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:19,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452590633] [2022-02-15 14:38:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:19,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:19,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:19,949 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) [2022-02-15 14:38:19,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-15 14:38:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:19,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 14:38:19,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:20,008 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 11 treesize of output 7 [2022-02-15 14:38:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:20,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:20,069 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 14:38:20,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-02-15 14:38:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:20,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452590633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:20,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:20,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-15 14:38:20,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361060340] [2022-02-15 14:38:20,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:20,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 14:38:20,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:20,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 14:38:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-02-15 14:38:20,077 INFO L87 Difference]: Start difference. First operand 154 states and 296 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:20,148 INFO L93 Difference]: Finished difference Result 212 states and 411 transitions. [2022-02-15 14:38:20,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 14:38:20,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 14:38:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:20,149 INFO L225 Difference]: With dead ends: 212 [2022-02-15 14:38:20,149 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 14:38:20,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:38:20,151 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:20,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 162 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:38:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 14:38:20,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 168. [2022-02-15 14:38:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9880239520958083) internal successors, (332), 167 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 332 transitions. [2022-02-15 14:38:20,158 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 332 transitions. Word has length 25 [2022-02-15 14:38:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:20,158 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 332 transitions. [2022-02-15 14:38:20,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 332 transitions. [2022-02-15 14:38:20,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:38:20,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:20,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:20,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:20,363 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,SelfDestructingSolverStorable12 [2022-02-15 14:38:20,363 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:20,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1932903841, now seen corresponding path program 12 times [2022-02-15 14:38:20,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:20,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241558121] [2022-02-15 14:38:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:20,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:20,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:20,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241558121] [2022-02-15 14:38:20,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241558121] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:38:20,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:38:20,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 14:38:20,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685046279] [2022-02-15 14:38:20,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:38:20,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 14:38:20,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 14:38:20,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:38:20,395 INFO L87 Difference]: Start difference. First operand 168 states and 332 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:20,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:20,413 INFO L93 Difference]: Finished difference Result 416 states and 813 transitions. [2022-02-15 14:38:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:38:20,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 14:38:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:20,416 INFO L225 Difference]: With dead ends: 416 [2022-02-15 14:38:20,416 INFO L226 Difference]: Without dead ends: 372 [2022-02-15 14:38:20,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:38:20,417 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:20,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 88 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:38:20,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-02-15 14:38:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 330. [2022-02-15 14:38:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.0395136778115504) internal successors, (671), 329 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 671 transitions. [2022-02-15 14:38:20,425 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 671 transitions. Word has length 26 [2022-02-15 14:38:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:20,425 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 671 transitions. [2022-02-15 14:38:20,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 671 transitions. [2022-02-15 14:38:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:38:20,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:20,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:20,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 14:38:20,428 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:20,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2125140257, now seen corresponding path program 2 times [2022-02-15 14:38:20,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:20,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582347375] [2022-02-15 14:38:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:20,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:20,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:20,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582347375] [2022-02-15 14:38:20,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582347375] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:20,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117979264] [2022-02-15 14:38:20,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:38:20,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:20,808 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) [2022-02-15 14:38:20,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-15 14:38:20,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:38:20,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:20,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:38:20,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:21,133 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 15 treesize of output 7 [2022-02-15 14:38:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:21,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:21,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:21,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:38:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:22,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117979264] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:22,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:22,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 41 [2022-02-15 14:38:22,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140375701] [2022-02-15 14:38:22,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:22,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 14:38:22,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:22,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 14:38:22,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 14:38:22,083 INFO L87 Difference]: Start difference. First operand 330 states and 671 transitions. Second operand has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:23,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:23,708 INFO L93 Difference]: Finished difference Result 670 states and 1321 transitions. [2022-02-15 14:38:23,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:38:23,709 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:38:23,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:23,712 INFO L225 Difference]: With dead ends: 670 [2022-02-15 14:38:23,712 INFO L226 Difference]: Without dead ends: 663 [2022-02-15 14:38:23,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=335, Invalid=3697, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 14:38:23,713 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 206 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:23,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 479 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:38:23,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-02-15 14:38:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 355. [2022-02-15 14:38:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0141242937853105) internal successors, (713), 354 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 713 transitions. [2022-02-15 14:38:23,729 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 713 transitions. Word has length 30 [2022-02-15 14:38:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:23,729 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 713 transitions. [2022-02-15 14:38:23,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 713 transitions. [2022-02-15 14:38:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:38:23,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:23,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:23,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:23,931 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 [2022-02-15 14:38:23,931 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:23,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1190255993, now seen corresponding path program 3 times [2022-02-15 14:38:23,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:23,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756549018] [2022-02-15 14:38:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:23,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:24,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:24,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756549018] [2022-02-15 14:38:24,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756549018] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:24,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9654068] [2022-02-15 14:38:24,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:38:24,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:24,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:24,315 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) [2022-02-15 14:38:24,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-15 14:38:24,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:38:24,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:24,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:38:24,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:24,542 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 11 treesize of output 7 [2022-02-15 14:38:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:24,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:25,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:25,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:38:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:25,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9654068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:25,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:25,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-02-15 14:38:25,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358513712] [2022-02-15 14:38:25,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:25,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 14:38:25,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 14:38:25,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:38:25,516 INFO L87 Difference]: Start difference. First operand 355 states and 713 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:27,412 INFO L93 Difference]: Finished difference Result 708 states and 1382 transitions. [2022-02-15 14:38:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:38:27,412 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:38:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:27,415 INFO L225 Difference]: With dead ends: 708 [2022-02-15 14:38:27,415 INFO L226 Difference]: Without dead ends: 699 [2022-02-15 14:38:27,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=382, Invalid=4040, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 14:38:27,416 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 173 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:27,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 605 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2306 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 14:38:27,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-02-15 14:38:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 384. [2022-02-15 14:38:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0078328981723237) internal successors, (769), 383 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 769 transitions. [2022-02-15 14:38:27,429 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 769 transitions. Word has length 30 [2022-02-15 14:38:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:27,429 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 769 transitions. [2022-02-15 14:38:27,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 769 transitions. [2022-02-15 14:38:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:38:27,430 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:27,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:27,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:27,655 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 [2022-02-15 14:38:27,655 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash -308190269, now seen corresponding path program 4 times [2022-02-15 14:38:27,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:27,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600316533] [2022-02-15 14:38:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:27,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:28,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:28,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600316533] [2022-02-15 14:38:28,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600316533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:28,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953382757] [2022-02-15 14:38:28,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:38:28,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:28,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:28,056 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) [2022-02-15 14:38:28,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-15 14:38:28,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:38:28,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:28,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:38:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:28,295 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 15 treesize of output 7 [2022-02-15 14:38:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:28,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:29,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:29,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:38:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:29,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953382757] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:29,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:29,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-02-15 14:38:29,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633009988] [2022-02-15 14:38:29,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:29,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 14:38:29,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:29,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 14:38:29,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:38:29,316 INFO L87 Difference]: Start difference. First operand 384 states and 769 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:31,182 INFO L93 Difference]: Finished difference Result 575 states and 1126 transitions. [2022-02-15 14:38:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:38:31,182 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:38:31,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:31,184 INFO L225 Difference]: With dead ends: 575 [2022-02-15 14:38:31,184 INFO L226 Difference]: Without dead ends: 560 [2022-02-15 14:38:31,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=420, Invalid=4136, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:38:31,186 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 215 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:31,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 404 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:38:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-02-15 14:38:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 380. [2022-02-15 14:38:31,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0079155672823217) internal successors, (761), 379 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 761 transitions. [2022-02-15 14:38:31,196 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 761 transitions. Word has length 30 [2022-02-15 14:38:31,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:31,196 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 761 transitions. [2022-02-15 14:38:31,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 761 transitions. [2022-02-15 14:38:31,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:38:31,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:31,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:31,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-02-15 14:38:31,411 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 [2022-02-15 14:38:31,411 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1160476449, now seen corresponding path program 5 times [2022-02-15 14:38:31,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:31,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105690191] [2022-02-15 14:38:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:31,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:31,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:31,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105690191] [2022-02-15 14:38:31,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105690191] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:31,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714518438] [2022-02-15 14:38:31,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:38:31,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:31,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:31,791 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) [2022-02-15 14:38:31,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-15 14:38:31,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:38:31,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:31,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:38:31,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:32,012 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 11 treesize of output 7 [2022-02-15 14:38:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:32,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:32,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:32,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:38:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:32,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714518438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:32,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:32,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 37 [2022-02-15 14:38:32,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742944079] [2022-02-15 14:38:32,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:32,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 14:38:32,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 14:38:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 14:38:32,864 INFO L87 Difference]: Start difference. First operand 380 states and 761 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 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) [2022-02-15 14:38:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:34,226 INFO L93 Difference]: Finished difference Result 731 states and 1429 transitions. [2022-02-15 14:38:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 14:38:34,226 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 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 30 [2022-02-15 14:38:34,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:34,228 INFO L225 Difference]: With dead ends: 731 [2022-02-15 14:38:34,228 INFO L226 Difference]: Without dead ends: 686 [2022-02-15 14:38:34,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=355, Invalid=3305, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 14:38:34,230 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 197 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:34,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 436 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:38:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-02-15 14:38:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 368. [2022-02-15 14:38:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.008174386920981) internal successors, (737), 367 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 737 transitions. [2022-02-15 14:38:34,241 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 737 transitions. Word has length 30 [2022-02-15 14:38:34,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:34,241 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 737 transitions. [2022-02-15 14:38:34,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 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) [2022-02-15 14:38:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 737 transitions. [2022-02-15 14:38:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:38:34,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:34,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:34,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-15 14:38:34,455 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 [2022-02-15 14:38:34,456 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:34,456 INFO L85 PathProgramCache]: Analyzing trace with hash -717883435, now seen corresponding path program 6 times [2022-02-15 14:38:34,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:34,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436745329] [2022-02-15 14:38:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:34,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:34,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:34,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436745329] [2022-02-15 14:38:34,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436745329] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:34,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569075587] [2022-02-15 14:38:34,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:38:34,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:34,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:34,824 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) [2022-02-15 14:38:34,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-15 14:38:34,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:38:34,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:34,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:38:34,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:35,065 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 11 treesize of output 7 [2022-02-15 14:38:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:35,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:35,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:35,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:38:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:35,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569075587] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:35,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:35,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-02-15 14:38:35,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022013488] [2022-02-15 14:38:35,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:35,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 14:38:35,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:35,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 14:38:35,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 14:38:35,939 INFO L87 Difference]: Start difference. First operand 368 states and 737 transitions. Second operand has 40 states, 40 states have (on average 1.85) internal successors, (74), 39 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) [2022-02-15 14:38:37,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:37,565 INFO L93 Difference]: Finished difference Result 735 states and 1433 transitions. [2022-02-15 14:38:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:38:37,565 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 39 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 30 [2022-02-15 14:38:37,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:37,568 INFO L225 Difference]: With dead ends: 735 [2022-02-15 14:38:37,568 INFO L226 Difference]: Without dead ends: 702 [2022-02-15 14:38:37,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=3782, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:38:37,569 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:37,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 534 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:38:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-02-15 14:38:37,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 366. [2022-02-15 14:38:37,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.0082191780821916) internal successors, (733), 365 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 733 transitions. [2022-02-15 14:38:37,580 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 733 transitions. Word has length 30 [2022-02-15 14:38:37,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:37,580 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 733 transitions. [2022-02-15 14:38:37,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 39 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) [2022-02-15 14:38:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 733 transitions. [2022-02-15 14:38:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:38:37,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:37,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:37,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:37,795 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 [2022-02-15 14:38:37,795 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:37,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:37,796 INFO L85 PathProgramCache]: Analyzing trace with hash 265021255, now seen corresponding path program 7 times [2022-02-15 14:38:37,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:37,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001966817] [2022-02-15 14:38:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:37,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:38,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:38,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001966817] [2022-02-15 14:38:38,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001966817] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:38,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250881779] [2022-02-15 14:38:38,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:38:38,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:38,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:38,138 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) [2022-02-15 14:38:38,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-15 14:38:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:38:38,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:38,362 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 15 treesize of output 7 [2022-02-15 14:38:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:38,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:39,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:39,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:38:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:39,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250881779] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:39,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:39,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2022-02-15 14:38:39,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654975344] [2022-02-15 14:38:39,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:39,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:38:39,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:39,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:38:39,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:38:39,289 INFO L87 Difference]: Start difference. First operand 366 states and 733 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 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) [2022-02-15 14:38:41,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:41,068 INFO L93 Difference]: Finished difference Result 745 states and 1449 transitions. [2022-02-15 14:38:41,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:38:41,069 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 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 30 [2022-02-15 14:38:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:41,071 INFO L225 Difference]: With dead ends: 745 [2022-02-15 14:38:41,071 INFO L226 Difference]: Without dead ends: 709 [2022-02-15 14:38:41,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=403, Invalid=4289, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:38:41,072 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 195 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:41,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 586 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:38:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-02-15 14:38:41,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 364. [2022-02-15 14:38:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2022-02-15 14:38:41,083 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2022-02-15 14:38:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:41,083 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2022-02-15 14:38:41,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 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) [2022-02-15 14:38:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2022-02-15 14:38:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:38:41,084 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:41,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:41,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:41,307 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 [2022-02-15 14:38:41,307 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:41,308 INFO L85 PathProgramCache]: Analyzing trace with hash 103016025, now seen corresponding path program 8 times [2022-02-15 14:38:41,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:41,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403915672] [2022-02-15 14:38:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:41,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:41,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:41,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403915672] [2022-02-15 14:38:41,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403915672] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:41,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751188814] [2022-02-15 14:38:41,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:38:41,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:41,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:41,696 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) [2022-02-15 14:38:41,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-15 14:38:41,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:38:41,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:41,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:38:41,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:41,954 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 15 treesize of output 7 [2022-02-15 14:38:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:42,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:42,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:42,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:38:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:42,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751188814] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:42,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:42,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2022-02-15 14:38:42,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816157099] [2022-02-15 14:38:42,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:42,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:38:42,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:38:42,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1648, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:38:42,859 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 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) [2022-02-15 14:38:44,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:44,510 INFO L93 Difference]: Finished difference Result 702 states and 1377 transitions. [2022-02-15 14:38:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:38:44,511 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 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 30 [2022-02-15 14:38:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:44,513 INFO L225 Difference]: With dead ends: 702 [2022-02-15 14:38:44,513 INFO L226 Difference]: Without dead ends: 695 [2022-02-15 14:38:44,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=360, Invalid=3930, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 14:38:44,514 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 173 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:44,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 664 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:38:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-02-15 14:38:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 364. [2022-02-15 14:38:44,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2022-02-15 14:38:44,524 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2022-02-15 14:38:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:44,524 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2022-02-15 14:38:44,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 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) [2022-02-15 14:38:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2022-02-15 14:38:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:38:44,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:44,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:44,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-15 14:38:44,739 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 [2022-02-15 14:38:44,739 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:44,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:44,740 INFO L85 PathProgramCache]: Analyzing trace with hash 790273287, now seen corresponding path program 9 times [2022-02-15 14:38:44,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:44,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086302570] [2022-02-15 14:38:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:44,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:45,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:45,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086302570] [2022-02-15 14:38:45,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086302570] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:45,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250280747] [2022-02-15 14:38:45,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:38:45,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:45,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:45,098 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) [2022-02-15 14:38:45,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-15 14:38:45,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:38:45,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:45,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:38:45,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:45,332 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 11 treesize of output 7 [2022-02-15 14:38:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:45,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:46,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:46,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:38:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:46,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250280747] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:46,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:46,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:38:46,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250936565] [2022-02-15 14:38:46,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:46,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:38:46,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:46,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:38:46,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:38:46,229 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:49,527 INFO L93 Difference]: Finished difference Result 873 states and 1711 transitions. [2022-02-15 14:38:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 14:38:49,527 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:38:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:49,529 INFO L225 Difference]: With dead ends: 873 [2022-02-15 14:38:49,529 INFO L226 Difference]: Without dead ends: 864 [2022-02-15 14:38:49,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=925, Invalid=7817, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 14:38:49,530 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 359 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:49,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 410 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 14:38:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-02-15 14:38:49,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 386. [2022-02-15 14:38:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.0233766233766235) internal successors, (779), 385 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 779 transitions. [2022-02-15 14:38:49,541 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 779 transitions. Word has length 30 [2022-02-15 14:38:49,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:49,541 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 779 transitions. [2022-02-15 14:38:49,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:49,541 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 779 transitions. [2022-02-15 14:38:49,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:38:49,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:49,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:49,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-02-15 14:38:49,747 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 [2022-02-15 14:38:49,747 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1672339011, now seen corresponding path program 10 times [2022-02-15 14:38:49,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:49,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013301943] [2022-02-15 14:38:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:49,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:50,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:50,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013301943] [2022-02-15 14:38:50,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013301943] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:50,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019868870] [2022-02-15 14:38:50,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:38:50,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:50,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:50,103 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) [2022-02-15 14:38:50,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-15 14:38:50,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:38:50,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:50,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:38:50,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:50,327 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 11 treesize of output 7 [2022-02-15 14:38:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:50,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:51,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:51,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:38:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:51,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019868870] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:51,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:51,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:38:51,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853574158] [2022-02-15 14:38:51,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:51,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:38:51,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:51,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:38:51,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:38:51,239 INFO L87 Difference]: Start difference. First operand 386 states and 779 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:54,852 INFO L93 Difference]: Finished difference Result 727 states and 1429 transitions. [2022-02-15 14:38:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 14:38:54,852 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:38:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:54,854 INFO L225 Difference]: With dead ends: 727 [2022-02-15 14:38:54,854 INFO L226 Difference]: Without dead ends: 712 [2022-02-15 14:38:54,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=948, Invalid=7608, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 14:38:54,855 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 375 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 2622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:54,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 400 Invalid, 2622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 14:38:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-02-15 14:38:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 384. [2022-02-15 14:38:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.023498694516971) internal successors, (775), 383 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 775 transitions. [2022-02-15 14:38:54,863 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 775 transitions. Word has length 30 [2022-02-15 14:38:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:54,864 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 775 transitions. [2022-02-15 14:38:54,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 775 transitions. [2022-02-15 14:38:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:38:54,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:54,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:54,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-02-15 14:38:55,079 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 [2022-02-15 14:38:55,080 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:38:55,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:55,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1153961567, now seen corresponding path program 11 times [2022-02-15 14:38:55,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:55,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734189327] [2022-02-15 14:38:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:55,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:55,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:55,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734189327] [2022-02-15 14:38:55,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734189327] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:55,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692091542] [2022-02-15 14:38:55,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:38:55,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:55,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:55,476 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) [2022-02-15 14:38:55,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-15 14:38:55,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:38:55,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:55,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:38:55,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:55,700 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 11 treesize of output 7 [2022-02-15 14:38:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:56,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:56,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:56,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:38:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:56,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692091542] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:56,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:56,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:38:56,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123351753] [2022-02-15 14:38:56,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:56,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:38:56,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:56,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:38:56,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:38:56,686 INFO L87 Difference]: Start difference. First operand 384 states and 775 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:00,094 INFO L93 Difference]: Finished difference Result 800 states and 1548 transitions. [2022-02-15 14:39:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 14:39:00,095 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:00,097 INFO L225 Difference]: With dead ends: 800 [2022-02-15 14:39:00,098 INFO L226 Difference]: Without dead ends: 775 [2022-02-15 14:39:00,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 12 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=974, Invalid=8338, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 14:39:00,099 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 363 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:00,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 536 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2472 Invalid, 0 Unknown, 112 Unchecked, 1.0s Time] [2022-02-15 14:39:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-02-15 14:39:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 408. [2022-02-15 14:39:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0) internal successors, (814), 407 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 814 transitions. [2022-02-15 14:39:00,109 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 814 transitions. Word has length 30 [2022-02-15 14:39:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:00,109 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 814 transitions. [2022-02-15 14:39:00,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:00,110 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 814 transitions. [2022-02-15 14:39:00,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:00,111 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:00,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:00,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:00,315 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 [2022-02-15 14:39:00,315 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash -176520031, now seen corresponding path program 12 times [2022-02-15 14:39:00,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:00,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532477864] [2022-02-15 14:39:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:00,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:00,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:00,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532477864] [2022-02-15 14:39:00,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532477864] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:00,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046164085] [2022-02-15 14:39:00,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:39:00,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:00,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:00,729 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) [2022-02-15 14:39:00,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-15 14:39:00,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:39:00,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:00,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:39:00,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:00,949 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 11 treesize of output 7 [2022-02-15 14:39:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:01,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:01,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:01,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:01,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046164085] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:01,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:01,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:39:01,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158328837] [2022-02-15 14:39:01,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:01,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:39:01,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:01,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:39:01,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:39:01,948 INFO L87 Difference]: Start difference. First operand 408 states and 814 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:05,500 INFO L93 Difference]: Finished difference Result 928 states and 1802 transitions. [2022-02-15 14:39:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 14:39:05,501 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:05,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:05,504 INFO L225 Difference]: With dead ends: 928 [2022-02-15 14:39:05,504 INFO L226 Difference]: Without dead ends: 886 [2022-02-15 14:39:05,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 27 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2718 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1003, Invalid=8503, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 14:39:05,505 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 351 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:05,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 547 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2390 Invalid, 0 Unknown, 103 Unchecked, 1.0s Time] [2022-02-15 14:39:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-02-15 14:39:05,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 386. [2022-02-15 14:39:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.005194805194805) internal successors, (772), 385 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 772 transitions. [2022-02-15 14:39:05,516 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 772 transitions. Word has length 30 [2022-02-15 14:39:05,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:05,516 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 772 transitions. [2022-02-15 14:39:05,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 772 transitions. [2022-02-15 14:39:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:05,517 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:05,517 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:05,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:05,740 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 [2022-02-15 14:39:05,741 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:05,741 INFO L85 PathProgramCache]: Analyzing trace with hash -265343177, now seen corresponding path program 13 times [2022-02-15 14:39:05,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:05,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608840257] [2022-02-15 14:39:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:05,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:06,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:06,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608840257] [2022-02-15 14:39:06,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608840257] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:06,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644464943] [2022-02-15 14:39:06,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:39:06,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:06,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:06,141 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) [2022-02-15 14:39:06,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-15 14:39:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:06,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:39:06,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:06,365 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 11 treesize of output 7 [2022-02-15 14:39:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:06,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:07,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:07,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:07,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644464943] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:07,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:07,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:39:07,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890347908] [2022-02-15 14:39:07,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:07,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:39:07,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:07,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:39:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:39:07,282 INFO L87 Difference]: Start difference. First operand 386 states and 772 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:09,756 INFO L93 Difference]: Finished difference Result 758 states and 1487 transitions. [2022-02-15 14:39:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 14:39:09,757 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:09,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:09,759 INFO L225 Difference]: With dead ends: 758 [2022-02-15 14:39:09,759 INFO L226 Difference]: Without dead ends: 749 [2022-02-15 14:39:09,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=653, Invalid=5827, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 14:39:09,760 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 261 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:09,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 470 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2054 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:39:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-02-15 14:39:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 388. [2022-02-15 14:39:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0025839793281652) internal successors, (775), 387 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 775 transitions. [2022-02-15 14:39:09,774 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 775 transitions. Word has length 30 [2022-02-15 14:39:09,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:09,774 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 775 transitions. [2022-02-15 14:39:09,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 775 transitions. [2022-02-15 14:39:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:09,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:09,775 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:09,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:09,990 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 [2022-02-15 14:39:09,990 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:09,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash 616722547, now seen corresponding path program 14 times [2022-02-15 14:39:09,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:09,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096091155] [2022-02-15 14:39:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:09,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:10,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:10,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096091155] [2022-02-15 14:39:10,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096091155] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:10,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758454694] [2022-02-15 14:39:10,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:39:10,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:10,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:10,351 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) [2022-02-15 14:39:10,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-15 14:39:10,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:39:10,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:10,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:39:10,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:10,583 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 11 treesize of output 7 [2022-02-15 14:39:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:11,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:11,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:11,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:11,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758454694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:11,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:11,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:39:11,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871641058] [2022-02-15 14:39:11,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:11,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:39:11,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:11,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:39:11,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:39:11,613 INFO L87 Difference]: Start difference. First operand 388 states and 775 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:14,452 INFO L93 Difference]: Finished difference Result 628 states and 1232 transitions. [2022-02-15 14:39:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 14:39:14,453 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:14,454 INFO L225 Difference]: With dead ends: 628 [2022-02-15 14:39:14,454 INFO L226 Difference]: Without dead ends: 595 [2022-02-15 14:39:14,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=713, Invalid=6093, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 14:39:14,455 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 309 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:14,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 472 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2196 Invalid, 0 Unknown, 71 Unchecked, 0.9s Time] [2022-02-15 14:39:14,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-15 14:39:14,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 378. [2022-02-15 14:39:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.0159151193633953) internal successors, (760), 377 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 760 transitions. [2022-02-15 14:39:14,462 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 760 transitions. Word has length 30 [2022-02-15 14:39:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:14,462 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 760 transitions. [2022-02-15 14:39:14,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:14,463 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 760 transitions. [2022-02-15 14:39:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:14,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:14,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:14,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:14,675 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 [2022-02-15 14:39:14,675 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash -261285103, now seen corresponding path program 15 times [2022-02-15 14:39:14,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:14,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356285700] [2022-02-15 14:39:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:14,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:15,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:15,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356285700] [2022-02-15 14:39:15,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356285700] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:15,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164572010] [2022-02-15 14:39:15,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:39:15,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:15,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:15,008 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) [2022-02-15 14:39:15,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-15 14:39:15,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:39:15,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:15,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:39:15,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:15,204 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 15 treesize of output 7 [2022-02-15 14:39:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:15,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:16,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:16,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:16,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164572010] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:16,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:16,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-02-15 14:39:16,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899922443] [2022-02-15 14:39:16,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:16,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:39:16,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:16,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:39:16,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:39:16,137 INFO L87 Difference]: Start difference. First operand 378 states and 760 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:18,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:18,424 INFO L93 Difference]: Finished difference Result 770 states and 1520 transitions. [2022-02-15 14:39:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 14:39:18,425 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:18,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:18,426 INFO L225 Difference]: With dead ends: 770 [2022-02-15 14:39:18,427 INFO L226 Difference]: Without dead ends: 737 [2022-02-15 14:39:18,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=609, Invalid=5243, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 14:39:18,427 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 244 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:18,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 465 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:39:18,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-02-15 14:39:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 376. [2022-02-15 14:39:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.018666666666667) internal successors, (757), 375 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 757 transitions. [2022-02-15 14:39:18,435 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 757 transitions. Word has length 30 [2022-02-15 14:39:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:18,435 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 757 transitions. [2022-02-15 14:39:18,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 757 transitions. [2022-02-15 14:39:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:18,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:18,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:18,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:18,651 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 [2022-02-15 14:39:18,651 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:18,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:18,652 INFO L85 PathProgramCache]: Analyzing trace with hash 224852401, now seen corresponding path program 16 times [2022-02-15 14:39:18,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:18,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790287512] [2022-02-15 14:39:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:18,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:19,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:19,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790287512] [2022-02-15 14:39:19,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790287512] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:19,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078687956] [2022-02-15 14:39:19,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:39:19,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:19,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:19,032 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) [2022-02-15 14:39:19,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-15 14:39:19,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:39:19,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:19,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:39:19,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:19,261 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 11 treesize of output 7 [2022-02-15 14:39:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:19,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:20,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:20,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:20,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078687956] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:20,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:20,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:39:20,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982439198] [2022-02-15 14:39:20,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:20,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:39:20,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:20,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:39:20,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:39:20,138 INFO L87 Difference]: Start difference. First operand 376 states and 757 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:22,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:22,660 INFO L93 Difference]: Finished difference Result 768 states and 1506 transitions. [2022-02-15 14:39:22,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 14:39:22,661 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:22,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:22,663 INFO L225 Difference]: With dead ends: 768 [2022-02-15 14:39:22,663 INFO L226 Difference]: Without dead ends: 759 [2022-02-15 14:39:22,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=609, Invalid=6033, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:39:22,664 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 263 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:22,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 446 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:39:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-02-15 14:39:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 391. [2022-02-15 14:39:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0153846153846153) internal successors, (786), 390 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 786 transitions. [2022-02-15 14:39:22,673 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 786 transitions. Word has length 30 [2022-02-15 14:39:22,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:22,673 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 786 transitions. [2022-02-15 14:39:22,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 786 transitions. [2022-02-15 14:39:22,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:22,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:22,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:22,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:22,887 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 [2022-02-15 14:39:22,887 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1106918125, now seen corresponding path program 17 times [2022-02-15 14:39:22,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:22,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851195161] [2022-02-15 14:39:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:22,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:23,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:23,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851195161] [2022-02-15 14:39:23,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851195161] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:23,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362134574] [2022-02-15 14:39:23,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:39:23,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:23,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:23,300 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) [2022-02-15 14:39:23,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-15 14:39:23,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:39:23,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:23,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:39:23,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:23,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:39:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:23,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:24,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:24,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:24,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362134574] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:24,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:24,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:39:24,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117043902] [2022-02-15 14:39:24,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:24,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:39:24,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:24,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:39:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:39:24,448 INFO L87 Difference]: Start difference. First operand 391 states and 786 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:27,356 INFO L93 Difference]: Finished difference Result 660 states and 1303 transitions. [2022-02-15 14:39:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 14:39:27,358 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:27,359 INFO L225 Difference]: With dead ends: 660 [2022-02-15 14:39:27,360 INFO L226 Difference]: Without dead ends: 645 [2022-02-15 14:39:27,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=653, Invalid=5989, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:39:27,361 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 284 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:27,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 497 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:39:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-02-15 14:39:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 389. [2022-02-15 14:39:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.015463917525773) internal successors, (782), 388 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 782 transitions. [2022-02-15 14:39:27,367 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 782 transitions. Word has length 30 [2022-02-15 14:39:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:27,367 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 782 transitions. [2022-02-15 14:39:27,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:27,367 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 782 transitions. [2022-02-15 14:39:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:27,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:27,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:27,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:27,568 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 [2022-02-15 14:39:27,568 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:27,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1719382453, now seen corresponding path program 18 times [2022-02-15 14:39:27,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:27,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230057959] [2022-02-15 14:39:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:27,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:27,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:27,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230057959] [2022-02-15 14:39:27,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230057959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:27,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948204055] [2022-02-15 14:39:27,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:39:27,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:27,961 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) [2022-02-15 14:39:27,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-15 14:39:27,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:39:27,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:27,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:39:27,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:28,176 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 11 treesize of output 7 [2022-02-15 14:39:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:28,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:28,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:28,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:29,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948204055] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:29,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:29,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:39:29,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854743093] [2022-02-15 14:39:29,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:29,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:39:29,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:29,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:39:29,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:39:29,042 INFO L87 Difference]: Start difference. First operand 389 states and 782 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:31,575 INFO L93 Difference]: Finished difference Result 783 states and 1542 transitions. [2022-02-15 14:39:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 14:39:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:31,578 INFO L225 Difference]: With dead ends: 783 [2022-02-15 14:39:31,578 INFO L226 Difference]: Without dead ends: 738 [2022-02-15 14:39:31,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=615, Invalid=5547, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:39:31,579 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 270 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:31,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 449 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:39:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-02-15 14:39:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 381. [2022-02-15 14:39:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:31,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2022-02-15 14:39:31,587 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2022-02-15 14:39:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:31,587 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2022-02-15 14:39:31,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2022-02-15 14:39:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:31,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:31,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:31,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:31,799 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 [2022-02-15 14:39:31,799 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:31,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:31,800 INFO L85 PathProgramCache]: Analyzing trace with hash 228910475, now seen corresponding path program 19 times [2022-02-15 14:39:31,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:31,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044434776] [2022-02-15 14:39:31,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:31,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:32,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:32,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044434776] [2022-02-15 14:39:32,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044434776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:32,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094145439] [2022-02-15 14:39:32,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:39:32,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:32,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:32,150 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) [2022-02-15 14:39:32,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-15 14:39:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:32,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:39:32,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:32,352 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 11 treesize of output 7 [2022-02-15 14:39:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:32,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:33,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:33,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:33,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094145439] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:33,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:33,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-02-15 14:39:33,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919137173] [2022-02-15 14:39:33,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:33,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:39:33,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:39:33,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:39:33,259 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:35,417 INFO L93 Difference]: Finished difference Result 766 states and 1511 transitions. [2022-02-15 14:39:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 14:39:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:35,419 INFO L225 Difference]: With dead ends: 766 [2022-02-15 14:39:35,419 INFO L226 Difference]: Without dead ends: 733 [2022-02-15 14:39:35,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=564, Invalid=5288, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 14:39:35,420 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 246 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:35,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 404 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:39:35,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-02-15 14:39:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 379. [2022-02-15 14:39:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.015873015873016) internal successors, (762), 378 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 762 transitions. [2022-02-15 14:39:35,428 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 762 transitions. Word has length 30 [2022-02-15 14:39:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:35,429 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 762 transitions. [2022-02-15 14:39:35,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:35,429 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 762 transitions. [2022-02-15 14:39:35,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:35,430 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:35,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:35,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:35,643 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 [2022-02-15 14:39:35,643 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:35,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash -2110598265, now seen corresponding path program 20 times [2022-02-15 14:39:35,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:35,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112229251] [2022-02-15 14:39:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:35,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:35,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:35,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112229251] [2022-02-15 14:39:35,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112229251] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:35,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100550015] [2022-02-15 14:39:35,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:39:35,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:35,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:35,994 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) [2022-02-15 14:39:35,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-15 14:39:36,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:39:36,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:36,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:39:36,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:36,196 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 15 treesize of output 7 [2022-02-15 14:39:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:36,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:37,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:37,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:37,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100550015] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:37,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:37,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2022-02-15 14:39:37,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523552066] [2022-02-15 14:39:37,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:37,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 14:39:37,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:37,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 14:39:37,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:39:37,183 INFO L87 Difference]: Start difference. First operand 379 states and 762 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:39,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:39,685 INFO L93 Difference]: Finished difference Result 767 states and 1512 transitions. [2022-02-15 14:39:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 14:39:39,685 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:39,687 INFO L225 Difference]: With dead ends: 767 [2022-02-15 14:39:39,687 INFO L226 Difference]: Without dead ends: 731 [2022-02-15 14:39:39,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1756 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=589, Invalid=5891, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 14:39:39,688 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 217 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:39,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 629 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:39:39,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-02-15 14:39:39,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 377. [2022-02-15 14:39:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2022-02-15 14:39:39,694 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2022-02-15 14:39:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:39,695 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2022-02-15 14:39:39,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:39,695 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2022-02-15 14:39:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:39,696 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:39,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:39,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-15 14:39:39,901 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 [2022-02-15 14:39:39,902 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:39,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:39,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1453752901, now seen corresponding path program 21 times [2022-02-15 14:39:39,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:39,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862741846] [2022-02-15 14:39:39,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:39,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:40,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:40,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862741846] [2022-02-15 14:39:40,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862741846] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:40,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884378725] [2022-02-15 14:39:40,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:39:40,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:40,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:40,278 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) [2022-02-15 14:39:40,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-15 14:39:40,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:39:40,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:40,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:39:40,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:40,531 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 11 treesize of output 7 [2022-02-15 14:39:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:40,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:41,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:41,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:41,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884378725] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:41,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:41,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:39:41,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876437862] [2022-02-15 14:39:41,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:41,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:39:41,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:41,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:39:41,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:39:41,380 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:43,702 INFO L93 Difference]: Finished difference Result 771 states and 1503 transitions. [2022-02-15 14:39:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 14:39:43,702 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:43,704 INFO L225 Difference]: With dead ends: 771 [2022-02-15 14:39:43,704 INFO L226 Difference]: Without dead ends: 762 [2022-02-15 14:39:43,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=568, Invalid=5752, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 14:39:43,705 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 216 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:43,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 515 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:39:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-02-15 14:39:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 406. [2022-02-15 14:39:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2022-02-15 14:39:43,713 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2022-02-15 14:39:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:43,713 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2022-02-15 14:39:43,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2022-02-15 14:39:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:43,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:43,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:43,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:43,927 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 [2022-02-15 14:39:43,927 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash -571687177, now seen corresponding path program 22 times [2022-02-15 14:39:43,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:43,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272691391] [2022-02-15 14:39:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:43,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:44,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:44,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272691391] [2022-02-15 14:39:44,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272691391] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:44,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206235554] [2022-02-15 14:39:44,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:39:44,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:44,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:44,298 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) [2022-02-15 14:39:44,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-15 14:39:44,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:39:44,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:44,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:39:44,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:44,547 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 11 treesize of output 7 [2022-02-15 14:39:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:44,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:45,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:45,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:45,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206235554] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:45,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:45,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:39:45,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980544867] [2022-02-15 14:39:45,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:45,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:39:45,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:45,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:39:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:39:45,469 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:48,123 INFO L93 Difference]: Finished difference Result 632 states and 1237 transitions. [2022-02-15 14:39:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 14:39:48,124 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:48,130 INFO L225 Difference]: With dead ends: 632 [2022-02-15 14:39:48,130 INFO L226 Difference]: Without dead ends: 617 [2022-02-15 14:39:48,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=614, Invalid=5866, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 14:39:48,130 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 301 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 2275 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:48,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 454 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2275 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:39:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-02-15 14:39:48,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 402. [2022-02-15 14:39:48,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2022-02-15 14:39:48,136 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2022-02-15 14:39:48,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:48,136 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2022-02-15 14:39:48,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:48,136 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2022-02-15 14:39:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:48,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:48,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:48,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:48,338 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 [2022-02-15 14:39:48,338 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:48,338 INFO L85 PathProgramCache]: Analyzing trace with hash 896979541, now seen corresponding path program 23 times [2022-02-15 14:39:48,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:48,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269929125] [2022-02-15 14:39:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:48,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:48,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:48,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269929125] [2022-02-15 14:39:48,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269929125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:48,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213731294] [2022-02-15 14:39:48,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:39:48,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:48,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:48,764 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) [2022-02-15 14:39:48,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-15 14:39:48,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:39:48,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:39:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:49,068 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 11 treesize of output 7 [2022-02-15 14:39:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:49,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:49,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:49,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:50,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213731294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:50,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:50,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:39:50,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732037577] [2022-02-15 14:39:50,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:50,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:39:50,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:50,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:39:50,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:39:50,012 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:52,006 INFO L93 Difference]: Finished difference Result 794 states and 1550 transitions. [2022-02-15 14:39:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 14:39:52,007 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:52,010 INFO L225 Difference]: With dead ends: 794 [2022-02-15 14:39:52,010 INFO L226 Difference]: Without dead ends: 749 [2022-02-15 14:39:52,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=541, Invalid=4861, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 14:39:52,011 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 227 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:52,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 432 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1576 Invalid, 0 Unknown, 116 Unchecked, 0.6s Time] [2022-02-15 14:39:52,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-02-15 14:39:52,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 389. [2022-02-15 14:39:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0128865979381443) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 781 transitions. [2022-02-15 14:39:52,019 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 781 transitions. Word has length 30 [2022-02-15 14:39:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:52,019 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 781 transitions. [2022-02-15 14:39:52,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 781 transitions. [2022-02-15 14:39:52,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:52,020 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:52,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:52,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:52,235 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 [2022-02-15 14:39:52,235 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:52,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:52,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1449694827, now seen corresponding path program 24 times [2022-02-15 14:39:52,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:52,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891024330] [2022-02-15 14:39:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:52,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:52,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:52,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891024330] [2022-02-15 14:39:52,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891024330] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:52,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536720461] [2022-02-15 14:39:52,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:39:52,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:52,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:52,584 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) [2022-02-15 14:39:52,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-15 14:39:52,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:39:52,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:52,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:39:52,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:52,815 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 15 treesize of output 7 [2022-02-15 14:39:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:53,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:53,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:53,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:53,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536720461] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:53,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:53,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-02-15 14:39:53,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126185253] [2022-02-15 14:39:53,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:53,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:39:53,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:53,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:39:53,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:39:53,668 INFO L87 Difference]: Start difference. First operand 389 states and 781 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:55,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:55,647 INFO L93 Difference]: Finished difference Result 798 states and 1554 transitions. [2022-02-15 14:39:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 14:39:55,647 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:55,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:55,649 INFO L225 Difference]: With dead ends: 798 [2022-02-15 14:39:55,649 INFO L226 Difference]: Without dead ends: 765 [2022-02-15 14:39:55,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=522, Invalid=5028, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 14:39:55,650 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 255 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:55,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 432 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:39:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-02-15 14:39:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 386. [2022-02-15 14:39:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.012987012987013) internal successors, (775), 385 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 775 transitions. [2022-02-15 14:39:55,659 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 775 transitions. Word has length 30 [2022-02-15 14:39:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:55,660 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 775 transitions. [2022-02-15 14:39:55,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 775 transitions. [2022-02-15 14:39:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:55,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:55,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:55,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:55,883 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 [2022-02-15 14:39:55,883 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash 505763729, now seen corresponding path program 25 times [2022-02-15 14:39:55,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:55,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30015653] [2022-02-15 14:39:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:55,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:56,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:56,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30015653] [2022-02-15 14:39:56,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30015653] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:56,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713593772] [2022-02-15 14:39:56,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:39:56,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:56,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:56,246 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) [2022-02-15 14:39:56,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-15 14:39:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:56,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:39:56,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:56,512 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 11 treesize of output 7 [2022-02-15 14:39:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:56,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:57,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:57,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:39:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:57,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713593772] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:57,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:57,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2022-02-15 14:39:57,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410122189] [2022-02-15 14:39:57,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:57,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 14:39:57,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:57,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 14:39:57,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:39:57,436 INFO L87 Difference]: Start difference. First operand 386 states and 775 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:59,633 INFO L93 Difference]: Finished difference Result 808 states and 1570 transitions. [2022-02-15 14:39:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 14:39:59,633 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:39:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:59,636 INFO L225 Difference]: With dead ends: 808 [2022-02-15 14:39:59,636 INFO L226 Difference]: Without dead ends: 772 [2022-02-15 14:39:59,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=547, Invalid=5615, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:39:59,637 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 221 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:59,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 541 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:39:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-02-15 14:39:59,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 383. [2022-02-15 14:39:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0157068062827226) internal successors, (770), 382 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:59,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 770 transitions. [2022-02-15 14:39:59,644 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 770 transitions. Word has length 30 [2022-02-15 14:39:59,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:59,644 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 770 transitions. [2022-02-15 14:39:59,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 770 transitions. [2022-02-15 14:39:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:39:59,645 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:59,645 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:59,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:59,845 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 [2022-02-15 14:39:59,846 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:39:59,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:59,846 INFO L85 PathProgramCache]: Analyzing trace with hash 22360469, now seen corresponding path program 26 times [2022-02-15 14:39:59,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:59,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943149583] [2022-02-15 14:39:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:59,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:00,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:00,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943149583] [2022-02-15 14:40:00,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943149583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:00,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556792888] [2022-02-15 14:40:00,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:40:00,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:00,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:00,219 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) [2022-02-15 14:40:00,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-15 14:40:00,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:40:00,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:00,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:00,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:00,497 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 11 treesize of output 7 [2022-02-15 14:40:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:00,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:01,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:01,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-02-15 14:40:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:01,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556792888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:01,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:01,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 47 [2022-02-15 14:40:01,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304392931] [2022-02-15 14:40:01,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:01,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 14:40:01,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:01,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 14:40:01,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2058, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 14:40:01,572 INFO L87 Difference]: Start difference. First operand 383 states and 770 transitions. Second operand has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:04,128 INFO L93 Difference]: Finished difference Result 760 states and 1483 transitions. [2022-02-15 14:40:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 14:40:04,128 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:04,130 INFO L225 Difference]: With dead ends: 760 [2022-02-15 14:40:04,130 INFO L226 Difference]: Without dead ends: 753 [2022-02-15 14:40:04,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=574, Invalid=6232, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 14:40:04,131 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 211 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 2903 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:04,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 813 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2903 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 14:40:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-02-15 14:40:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 377. [2022-02-15 14:40:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2022-02-15 14:40:04,140 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2022-02-15 14:40:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:04,140 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2022-02-15 14:40:04,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2022-02-15 14:40:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:04,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:04,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:04,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-15 14:40:04,351 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 [2022-02-15 14:40:04,351 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:04,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:04,352 INFO L85 PathProgramCache]: Analyzing trace with hash 630707147, now seen corresponding path program 27 times [2022-02-15 14:40:04,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:04,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044259420] [2022-02-15 14:40:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:04,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:04,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:04,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044259420] [2022-02-15 14:40:04,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044259420] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:04,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707914146] [2022-02-15 14:40:04,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:40:04,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:04,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:04,705 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) [2022-02-15 14:40:04,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-15 14:40:04,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:40:04,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:04,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:40:04,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:04,900 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 11 treesize of output 7 [2022-02-15 14:40:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:05,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:05,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:05,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:05,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707914146] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:05,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:05,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:40:05,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48698299] [2022-02-15 14:40:05,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:05,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:40:05,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:05,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:40:05,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:40:05,844 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:07,792 INFO L93 Difference]: Finished difference Result 772 states and 1521 transitions. [2022-02-15 14:40:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:40:07,793 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:07,794 INFO L225 Difference]: With dead ends: 772 [2022-02-15 14:40:07,794 INFO L226 Difference]: Without dead ends: 763 [2022-02-15 14:40:07,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=485, Invalid=4771, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 14:40:07,795 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 160 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:07,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 494 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:40:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-02-15 14:40:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 394. [2022-02-15 14:40:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.015267175572519) internal successors, (792), 393 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 792 transitions. [2022-02-15 14:40:07,804 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 792 transitions. Word has length 30 [2022-02-15 14:40:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:07,804 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 792 transitions. [2022-02-15 14:40:07,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 792 transitions. [2022-02-15 14:40:07,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:07,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:07,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:07,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:08,006 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 [2022-02-15 14:40:08,006 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:08,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1512772871, now seen corresponding path program 28 times [2022-02-15 14:40:08,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:08,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042536485] [2022-02-15 14:40:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:08,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:08,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:08,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042536485] [2022-02-15 14:40:08,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042536485] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:08,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209056314] [2022-02-15 14:40:08,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:40:08,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:08,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:08,353 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) [2022-02-15 14:40:08,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-15 14:40:08,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:40:08,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:08,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:08,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:08,551 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 11 treesize of output 7 [2022-02-15 14:40:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:08,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:09,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:09,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:09,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209056314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:09,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:09,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:40:09,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841858901] [2022-02-15 14:40:09,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:09,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:40:09,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:09,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:40:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:40:09,542 INFO L87 Difference]: Start difference. First operand 394 states and 792 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:11,808 INFO L93 Difference]: Finished difference Result 846 states and 1686 transitions. [2022-02-15 14:40:11,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:40:11,809 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:11,810 INFO L225 Difference]: With dead ends: 846 [2022-02-15 14:40:11,810 INFO L226 Difference]: Without dead ends: 829 [2022-02-15 14:40:11,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 28 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=569, Invalid=5131, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 14:40:11,811 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 177 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:11,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 519 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2185 Invalid, 0 Unknown, 106 Unchecked, 0.9s Time] [2022-02-15 14:40:11,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-02-15 14:40:11,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 392. [2022-02-15 14:40:11,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0153452685421995) internal successors, (788), 391 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 788 transitions. [2022-02-15 14:40:11,819 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 788 transitions. Word has length 30 [2022-02-15 14:40:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:11,819 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 788 transitions. [2022-02-15 14:40:11,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 788 transitions. [2022-02-15 14:40:11,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:11,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:11,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:11,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:12,034 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 [2022-02-15 14:40:12,034 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:12,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:12,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1313527707, now seen corresponding path program 29 times [2022-02-15 14:40:12,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:12,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910229976] [2022-02-15 14:40:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:12,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:12,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:12,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910229976] [2022-02-15 14:40:12,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910229976] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:12,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300813553] [2022-02-15 14:40:12,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:40:12,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:12,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:12,391 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) [2022-02-15 14:40:12,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-15 14:40:12,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:40:12,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:12,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:40:12,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:12,578 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 11 treesize of output 7 [2022-02-15 14:40:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:12,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:13,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:13,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:13,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300813553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:13,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:13,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:40:13,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350515421] [2022-02-15 14:40:13,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:13,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:40:13,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:40:13,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:40:13,543 INFO L87 Difference]: Start difference. First operand 392 states and 788 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:15,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:15,427 INFO L93 Difference]: Finished difference Result 797 states and 1567 transitions. [2022-02-15 14:40:15,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:40:15,428 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:15,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:15,429 INFO L225 Difference]: With dead ends: 797 [2022-02-15 14:40:15,429 INFO L226 Difference]: Without dead ends: 760 [2022-02-15 14:40:15,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=498, Invalid=4614, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 14:40:15,429 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 191 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:15,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 487 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1726 Invalid, 0 Unknown, 56 Unchecked, 0.7s Time] [2022-02-15 14:40:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-02-15 14:40:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 390. [2022-02-15 14:40:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.0154241645244215) internal successors, (784), 389 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 784 transitions. [2022-02-15 14:40:15,438 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 784 transitions. Word has length 30 [2022-02-15 14:40:15,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:15,438 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 784 transitions. [2022-02-15 14:40:15,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:15,439 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 784 transitions. [2022-02-15 14:40:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:15,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:15,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:15,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:15,659 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 [2022-02-15 14:40:15,659 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:15,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:15,660 INFO L85 PathProgramCache]: Analyzing trace with hash -391825567, now seen corresponding path program 30 times [2022-02-15 14:40:15,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:15,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686306825] [2022-02-15 14:40:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:15,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:16,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:16,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686306825] [2022-02-15 14:40:16,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686306825] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:16,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433961979] [2022-02-15 14:40:16,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:40:16,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:16,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:16,076 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) [2022-02-15 14:40:16,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-15 14:40:16,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:40:16,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:16,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:40:16,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:16,273 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 11 treesize of output 7 [2022-02-15 14:40:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:16,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:17,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:17,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:17,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433961979] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:17,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:17,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:40:17,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328654301] [2022-02-15 14:40:17,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:17,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:40:17,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:17,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:40:17,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:40:17,191 INFO L87 Difference]: Start difference. First operand 390 states and 784 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:18,828 INFO L93 Difference]: Finished difference Result 776 states and 1535 transitions. [2022-02-15 14:40:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:40:18,828 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:18,830 INFO L225 Difference]: With dead ends: 776 [2022-02-15 14:40:18,830 INFO L226 Difference]: Without dead ends: 733 [2022-02-15 14:40:18,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=477, Invalid=4493, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 14:40:18,831 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 171 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:18,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 462 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1500 Invalid, 0 Unknown, 202 Unchecked, 0.6s Time] [2022-02-15 14:40:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-02-15 14:40:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 381. [2022-02-15 14:40:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:18,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2022-02-15 14:40:18,837 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2022-02-15 14:40:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:18,837 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2022-02-15 14:40:18,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2022-02-15 14:40:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:18,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:18,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:18,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-15 14:40:19,039 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 [2022-02-15 14:40:19,039 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:19,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:19,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1666851087, now seen corresponding path program 31 times [2022-02-15 14:40:19,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:19,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710808832] [2022-02-15 14:40:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:19,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:19,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:19,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710808832] [2022-02-15 14:40:19,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710808832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:19,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776064659] [2022-02-15 14:40:19,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:40:19,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:19,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:19,441 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) [2022-02-15 14:40:19,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-15 14:40:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:19,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:19,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:19,646 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 11 treesize of output 7 [2022-02-15 14:40:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:19,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:20,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:20,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:20,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776064659] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:20,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:20,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:40:20,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852378359] [2022-02-15 14:40:20,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:20,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:40:20,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:20,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:40:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:40:20,550 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:22,898 INFO L93 Difference]: Finished difference Result 849 states and 1671 transitions. [2022-02-15 14:40:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 14:40:22,899 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:22,900 INFO L225 Difference]: With dead ends: 849 [2022-02-15 14:40:22,900 INFO L226 Difference]: Without dead ends: 840 [2022-02-15 14:40:22,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=614, Invalid=5706, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 14:40:22,901 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 219 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:22,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 466 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:40:22,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-02-15 14:40:22,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 395. [2022-02-15 14:40:22,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.017766497461929) internal successors, (795), 394 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:22,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 795 transitions. [2022-02-15 14:40:22,907 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 795 transitions. Word has length 30 [2022-02-15 14:40:22,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:22,907 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 795 transitions. [2022-02-15 14:40:22,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:22,908 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 795 transitions. [2022-02-15 14:40:22,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:22,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:22,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:22,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:23,111 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 [2022-02-15 14:40:23,112 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash -784785363, now seen corresponding path program 32 times [2022-02-15 14:40:23,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:23,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713930990] [2022-02-15 14:40:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:23,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:23,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:23,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713930990] [2022-02-15 14:40:23,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713930990] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:23,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809433862] [2022-02-15 14:40:23,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:40:23,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:23,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:23,536 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) [2022-02-15 14:40:23,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-15 14:40:23,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:40:23,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:23,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:23,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:23,762 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 11 treesize of output 7 [2022-02-15 14:40:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:24,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:24,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:24,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-02-15 14:40:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:24,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809433862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:24,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:24,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-02-15 14:40:24,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456760178] [2022-02-15 14:40:24,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:24,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 14:40:24,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:24,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 14:40:24,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:40:24,858 INFO L87 Difference]: Start difference. First operand 395 states and 795 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:28,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:28,442 INFO L93 Difference]: Finished difference Result 1073 states and 2106 transitions. [2022-02-15 14:40:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 14:40:28,443 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:28,444 INFO L225 Difference]: With dead ends: 1073 [2022-02-15 14:40:28,444 INFO L226 Difference]: Without dead ends: 1066 [2022-02-15 14:40:28,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1183, Invalid=8917, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 14:40:28,445 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 329 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:28,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 473 Invalid, 2828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2469 Invalid, 0 Unknown, 162 Unchecked, 1.0s Time] [2022-02-15 14:40:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-02-15 14:40:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 397. [2022-02-15 14:40:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.0126262626262625) internal successors, (797), 396 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 797 transitions. [2022-02-15 14:40:28,454 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 797 transitions. Word has length 30 [2022-02-15 14:40:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:28,454 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 797 transitions. [2022-02-15 14:40:28,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 797 transitions. [2022-02-15 14:40:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:28,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:28,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:28,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:28,669 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 [2022-02-15 14:40:28,670 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:28,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash 192656173, now seen corresponding path program 33 times [2022-02-15 14:40:28,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:28,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386131017] [2022-02-15 14:40:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:28,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:29,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:29,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386131017] [2022-02-15 14:40:29,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386131017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:29,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046552873] [2022-02-15 14:40:29,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:40:29,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:29,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:29,036 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) [2022-02-15 14:40:29,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-15 14:40:29,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:40:29,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:29,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:40:29,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:29,237 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 11 treesize of output 7 [2022-02-15 14:40:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:29,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:30,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:30,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:30,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046552873] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:30,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:30,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:40:30,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736004791] [2022-02-15 14:40:30,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:30,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:40:30,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:30,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:40:30,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:40:30,204 INFO L87 Difference]: Start difference. First operand 397 states and 797 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:32,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:32,671 INFO L93 Difference]: Finished difference Result 727 states and 1433 transitions. [2022-02-15 14:40:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 14:40:32,672 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:32,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:32,673 INFO L225 Difference]: With dead ends: 727 [2022-02-15 14:40:32,673 INFO L226 Difference]: Without dead ends: 706 [2022-02-15 14:40:32,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=680, Invalid=5962, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:40:32,674 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 251 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:32,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 344 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1704 Invalid, 0 Unknown, 60 Unchecked, 0.7s Time] [2022-02-15 14:40:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-02-15 14:40:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 393. [2022-02-15 14:40:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.017857142857143) internal successors, (791), 392 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 791 transitions. [2022-02-15 14:40:32,680 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 791 transitions. Word has length 30 [2022-02-15 14:40:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:32,680 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 791 transitions. [2022-02-15 14:40:32,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 791 transitions. [2022-02-15 14:40:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:32,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:32,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:32,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:32,893 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 [2022-02-15 14:40:32,893 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:32,893 INFO L85 PathProgramCache]: Analyzing trace with hash 683881355, now seen corresponding path program 34 times [2022-02-15 14:40:32,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:32,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155311148] [2022-02-15 14:40:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:32,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:33,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:33,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155311148] [2022-02-15 14:40:33,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155311148] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:33,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630454322] [2022-02-15 14:40:33,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:40:33,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:33,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:33,296 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:40:33,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-15 14:40:33,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:40:33,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:33,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:33,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:33,499 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 11 treesize of output 7 [2022-02-15 14:40:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:33,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:34,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:34,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:34,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630454322] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:34,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:34,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:40:34,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903788854] [2022-02-15 14:40:34,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:34,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:40:34,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:34,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:40:34,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:40:34,344 INFO L87 Difference]: Start difference. First operand 393 states and 791 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:36,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:36,774 INFO L93 Difference]: Finished difference Result 864 states and 1702 transitions. [2022-02-15 14:40:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 14:40:36,775 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:36,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:36,776 INFO L225 Difference]: With dead ends: 864 [2022-02-15 14:40:36,776 INFO L226 Difference]: Without dead ends: 803 [2022-02-15 14:40:36,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=635, Invalid=5527, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:40:36,777 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 224 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:36,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 599 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:40:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-02-15 14:40:36,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 392. [2022-02-15 14:40:36,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.002557544757033) internal successors, (783), 391 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 783 transitions. [2022-02-15 14:40:36,784 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 783 transitions. Word has length 30 [2022-02-15 14:40:36,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:36,784 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 783 transitions. [2022-02-15 14:40:36,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:36,784 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 783 transitions. [2022-02-15 14:40:36,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:36,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:36,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:36,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:36,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-15 14:40:36,986 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:36,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:36,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1572499745, now seen corresponding path program 35 times [2022-02-15 14:40:36,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:36,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690739593] [2022-02-15 14:40:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:36,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:37,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:37,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690739593] [2022-02-15 14:40:37,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690739593] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:37,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080006908] [2022-02-15 14:40:37,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:40:37,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:37,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:37,411 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:40:37,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-15 14:40:37,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:40:37,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:37,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:37,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:37,645 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 11 treesize of output 7 [2022-02-15 14:40:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:37,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:38,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:38,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:38,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080006908] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:38,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:38,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:40:38,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306189609] [2022-02-15 14:40:38,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:38,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:40:38,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:40:38,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:40:38,542 INFO L87 Difference]: Start difference. First operand 392 states and 783 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:39,984 INFO L93 Difference]: Finished difference Result 750 states and 1475 transitions. [2022-02-15 14:40:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:40:39,985 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:39,986 INFO L225 Difference]: With dead ends: 750 [2022-02-15 14:40:39,986 INFO L226 Difference]: Without dead ends: 741 [2022-02-15 14:40:39,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=392, Invalid=3768, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:40:39,987 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 133 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:39,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 457 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:40:39,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-02-15 14:40:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 394. [2022-02-15 14:40:39,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0) internal successors, (786), 393 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:39,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 786 transitions. [2022-02-15 14:40:39,995 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 786 transitions. Word has length 30 [2022-02-15 14:40:39,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:39,995 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 786 transitions. [2022-02-15 14:40:39,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 786 transitions. [2022-02-15 14:40:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:39,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:39,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:40,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:40,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-15 14:40:40,203 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:40,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:40,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1840401827, now seen corresponding path program 36 times [2022-02-15 14:40:40,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:40,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884461647] [2022-02-15 14:40:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:40,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:40,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:40,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884461647] [2022-02-15 14:40:40,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884461647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:40,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466447454] [2022-02-15 14:40:40,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:40:40,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:40,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:40,565 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:40:40,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-15 14:40:40,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:40:40,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:40,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:40,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:40,757 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 11 treesize of output 7 [2022-02-15 14:40:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:41,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:41,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:41,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:41,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466447454] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:41,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:41,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:40:41,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779996857] [2022-02-15 14:40:41,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:41,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:40:41,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:41,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:40:41,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:40:41,701 INFO L87 Difference]: Start difference. First operand 394 states and 786 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:43,232 INFO L93 Difference]: Finished difference Result 642 states and 1273 transitions. [2022-02-15 14:40:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:40:43,233 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:43,234 INFO L225 Difference]: With dead ends: 642 [2022-02-15 14:40:43,234 INFO L226 Difference]: Without dead ends: 619 [2022-02-15 14:40:43,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=416, Invalid=3744, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:40:43,234 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:43,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 348 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:40:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-02-15 14:40:43,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 384. [2022-02-15 14:40:43,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0130548302872064) internal successors, (771), 383 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:43,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 771 transitions. [2022-02-15 14:40:43,239 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 771 transitions. Word has length 30 [2022-02-15 14:40:43,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:43,239 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 771 transitions. [2022-02-15 14:40:43,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:43,239 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 771 transitions. [2022-02-15 14:40:43,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:43,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:43,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:43,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:43,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:43,440 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:43,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1576557819, now seen corresponding path program 37 times [2022-02-15 14:40:43,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:43,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638618594] [2022-02-15 14:40:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:43,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:43,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:43,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638618594] [2022-02-15 14:40:43,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638618594] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:43,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262994380] [2022-02-15 14:40:43,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:40:43,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:43,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:43,830 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:40:43,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-15 14:40:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:43,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:44,064 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 11 treesize of output 7 [2022-02-15 14:40:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:44,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:44,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:44,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:44,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262994380] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:44,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:44,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-02-15 14:40:44,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627179662] [2022-02-15 14:40:44,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:44,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 14:40:44,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:44,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 14:40:44,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 14:40:44,982 INFO L87 Difference]: Start difference. First operand 384 states and 771 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:46,310 INFO L93 Difference]: Finished difference Result 758 states and 1502 transitions. [2022-02-15 14:40:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:40:46,310 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:46,311 INFO L225 Difference]: With dead ends: 758 [2022-02-15 14:40:46,311 INFO L226 Difference]: Without dead ends: 725 [2022-02-15 14:40:46,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=384, Invalid=3398, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:40:46,312 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 153 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:46,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 408 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:40:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-02-15 14:40:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 381. [2022-02-15 14:40:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2022-02-15 14:40:46,317 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2022-02-15 14:40:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:46,318 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2022-02-15 14:40:46,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2022-02-15 14:40:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:46,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:46,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:46,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:46,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-15 14:40:46,537 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:46,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:46,538 INFO L85 PathProgramCache]: Analyzing trace with hash 841891467, now seen corresponding path program 38 times [2022-02-15 14:40:46,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:46,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766154434] [2022-02-15 14:40:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:46,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:46,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:46,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766154434] [2022-02-15 14:40:46,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766154434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:46,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773919143] [2022-02-15 14:40:46,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:40:46,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:46,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:46,912 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:40:46,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-15 14:40:46,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:40:46,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:46,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:46,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:47,111 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 11 treesize of output 7 [2022-02-15 14:40:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:47,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:47,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:47,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:48,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773919143] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:48,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:48,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:40:48,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934714556] [2022-02-15 14:40:48,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:48,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:40:48,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:48,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:40:48,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:40:48,020 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:49,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:49,457 INFO L93 Difference]: Finished difference Result 770 states and 1514 transitions. [2022-02-15 14:40:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:40:49,457 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:49,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:49,459 INFO L225 Difference]: With dead ends: 770 [2022-02-15 14:40:49,459 INFO L226 Difference]: Without dead ends: 761 [2022-02-15 14:40:49,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=396, Invalid=3894, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 14:40:49,459 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 176 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:49,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 392 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:40:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-15 14:40:49,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 395. [2022-02-15 14:40:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.010152284263959) internal successors, (792), 394 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 792 transitions. [2022-02-15 14:40:49,474 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 792 transitions. Word has length 30 [2022-02-15 14:40:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:49,474 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 792 transitions. [2022-02-15 14:40:49,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 792 transitions. [2022-02-15 14:40:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:49,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:49,476 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:49,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:49,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:49,691 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:49,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1723957191, now seen corresponding path program 39 times [2022-02-15 14:40:49,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:49,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831663858] [2022-02-15 14:40:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:49,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:50,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:50,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831663858] [2022-02-15 14:40:50,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831663858] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:50,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231667052] [2022-02-15 14:40:50,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:40:50,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:50,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:50,063 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:40:50,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-15 14:40:50,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:40:50,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:50,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:50,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:50,258 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 11 treesize of output 7 [2022-02-15 14:40:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:50,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:51,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:51,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:51,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231667052] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:51,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:51,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:40:51,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78502259] [2022-02-15 14:40:51,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:51,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:40:51,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:51,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:40:51,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:40:51,298 INFO L87 Difference]: Start difference. First operand 395 states and 792 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:52,919 INFO L93 Difference]: Finished difference Result 667 states and 1316 transitions. [2022-02-15 14:40:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 14:40:52,920 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:52,921 INFO L225 Difference]: With dead ends: 667 [2022-02-15 14:40:52,921 INFO L226 Difference]: Without dead ends: 642 [2022-02-15 14:40:52,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=440, Invalid=4116, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:40:52,922 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 209 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:52,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 331 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1357 Invalid, 0 Unknown, 75 Unchecked, 0.5s Time] [2022-02-15 14:40:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-02-15 14:40:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 393. [2022-02-15 14:40:52,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2022-02-15 14:40:52,928 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2022-02-15 14:40:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:52,929 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2022-02-15 14:40:52,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2022-02-15 14:40:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:52,930 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:52,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:52,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:53,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-15 14:40:53,130 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:53,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1102343387, now seen corresponding path program 40 times [2022-02-15 14:40:53,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:53,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360265758] [2022-02-15 14:40:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:53,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:53,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:53,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360265758] [2022-02-15 14:40:53,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360265758] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:53,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54588460] [2022-02-15 14:40:53,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:40:53,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:53,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:53,560 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:40:53,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-15 14:40:53,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:40:53,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:53,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:53,798 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 11 treesize of output 7 [2022-02-15 14:40:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:54,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:54,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:54,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:54,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54588460] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:54,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:54,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:40:54,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806519157] [2022-02-15 14:40:54,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:54,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:40:54,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:54,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:40:54,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:40:54,675 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:55,911 INFO L93 Difference]: Finished difference Result 785 states and 1551 transitions. [2022-02-15 14:40:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:40:55,915 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:55,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:55,916 INFO L225 Difference]: With dead ends: 785 [2022-02-15 14:40:55,916 INFO L226 Difference]: Without dead ends: 740 [2022-02-15 14:40:55,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=386, Invalid=3396, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:40:55,917 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 154 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:55,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 337 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:40:55,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-02-15 14:40:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 385. [2022-02-15 14:40:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.0104166666666665) internal successors, (772), 384 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 772 transitions. [2022-02-15 14:40:55,922 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 772 transitions. Word has length 30 [2022-02-15 14:40:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:55,923 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 772 transitions. [2022-02-15 14:40:55,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 772 transitions. [2022-02-15 14:40:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:55,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:55,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:55,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:56,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-15 14:40:56,124 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash 845949541, now seen corresponding path program 41 times [2022-02-15 14:40:56,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:56,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404638613] [2022-02-15 14:40:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:56,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:56,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:56,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404638613] [2022-02-15 14:40:56,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404638613] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:56,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392560708] [2022-02-15 14:40:56,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:40:56,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:56,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:56,436 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:40:56,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-15 14:40:56,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:40:56,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:56,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:40:56,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:56,623 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 11 treesize of output 7 [2022-02-15 14:40:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:56,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:57,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:57,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:40:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:57,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392560708] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:57,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:57,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-02-15 14:40:57,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429355001] [2022-02-15 14:40:57,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:57,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 14:40:57,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:57,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 14:40:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 14:40:57,519 INFO L87 Difference]: Start difference. First operand 385 states and 772 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:58,682 INFO L93 Difference]: Finished difference Result 768 states and 1520 transitions. [2022-02-15 14:40:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:40:58,683 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:40:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:58,684 INFO L225 Difference]: With dead ends: 768 [2022-02-15 14:40:58,684 INFO L226 Difference]: Without dead ends: 735 [2022-02-15 14:40:58,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=365, Invalid=3295, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 14:40:58,685 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 151 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:58,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 364 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:40:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-02-15 14:40:58,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 383. [2022-02-15 14:40:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0104712041884816) internal successors, (768), 382 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 768 transitions. [2022-02-15 14:40:58,692 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 768 transitions. Word has length 30 [2022-02-15 14:40:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:58,692 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 768 transitions. [2022-02-15 14:40:58,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 768 transitions. [2022-02-15 14:40:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:40:58,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:58,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:58,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:58,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:58,907 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:40:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:58,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1493559199, now seen corresponding path program 42 times [2022-02-15 14:40:58,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:58,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222865385] [2022-02-15 14:40:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:58,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:59,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:59,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222865385] [2022-02-15 14:40:59,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222865385] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:59,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235410203] [2022-02-15 14:40:59,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:40:59,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:59,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:59,312 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:40:59,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-15 14:40:59,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:40:59,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:59,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:59,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:59,544 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 15 treesize of output 7 [2022-02-15 14:41:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:00,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:00,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:00,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:00,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235410203] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:00,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:00,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2022-02-15 14:41:00,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537204974] [2022-02-15 14:41:00,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:00,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 14:41:00,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:00,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 14:41:00,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:41:00,605 INFO L87 Difference]: Start difference. First operand 383 states and 768 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:01,865 INFO L93 Difference]: Finished difference Result 766 states and 1516 transitions. [2022-02-15 14:41:01,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:41:01,866 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:01,867 INFO L225 Difference]: With dead ends: 766 [2022-02-15 14:41:01,867 INFO L226 Difference]: Without dead ends: 730 [2022-02-15 14:41:01,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=390, Invalid=3770, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:41:01,868 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:01,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 425 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-02-15 14:41:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 380. [2022-02-15 14:41:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0131926121372032) internal successors, (763), 379 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:01,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 763 transitions. [2022-02-15 14:41:01,875 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 763 transitions. Word has length 30 [2022-02-15 14:41:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:01,875 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 763 transitions. [2022-02-15 14:41:01,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:01,875 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 763 transitions. [2022-02-15 14:41:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:01,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:01,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:01,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:02,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-15 14:41:02,098 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:02,099 INFO L85 PathProgramCache]: Analyzing trace with hash 866178951, now seen corresponding path program 43 times [2022-02-15 14:41:02,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:02,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163296719] [2022-02-15 14:41:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:02,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:02,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:02,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163296719] [2022-02-15 14:41:02,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163296719] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:02,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679115023] [2022-02-15 14:41:02,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:41:02,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:02,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:02,453 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:02,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-15 14:41:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:02,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:41:02,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:02,580 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 11 treesize of output 7 [2022-02-15 14:41:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:02,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:03,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:03,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:03,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679115023] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:03,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:03,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-02-15 14:41:03,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809462430] [2022-02-15 14:41:03,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:03,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 14:41:03,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:03,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 14:41:03,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 14:41:03,477 INFO L87 Difference]: Start difference. First operand 380 states and 763 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:04,979 INFO L93 Difference]: Finished difference Result 779 states and 1534 transitions. [2022-02-15 14:41:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:41:04,979 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:04,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:04,981 INFO L225 Difference]: With dead ends: 779 [2022-02-15 14:41:04,981 INFO L226 Difference]: Without dead ends: 770 [2022-02-15 14:41:04,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=461, Invalid=3699, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:41:04,982 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 167 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:04,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 354 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-02-15 14:41:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 404. [2022-02-15 14:41:04,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2022-02-15 14:41:04,990 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2022-02-15 14:41:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:04,990 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2022-02-15 14:41:04,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2022-02-15 14:41:04,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:04,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:04,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:05,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:05,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-15 14:41:05,208 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:05,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1748244675, now seen corresponding path program 44 times [2022-02-15 14:41:05,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:05,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796403337] [2022-02-15 14:41:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:05,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:05,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:05,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796403337] [2022-02-15 14:41:05,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796403337] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:05,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373850694] [2022-02-15 14:41:05,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:41:05,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:05,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:05,507 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:05,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-15 14:41:05,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:41:05,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:05,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:41:05,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:05,606 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 11 treesize of output 7 [2022-02-15 14:41:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:05,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:06,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:06,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-02-15 14:41:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:06,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373850694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:06,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:06,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 40 [2022-02-15 14:41:06,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644244033] [2022-02-15 14:41:06,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:06,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:41:06,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:06,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:41:06,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:41:06,636 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 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) [2022-02-15 14:41:08,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:08,362 INFO L93 Difference]: Finished difference Result 694 states and 1369 transitions. [2022-02-15 14:41:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:41:08,362 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:08,364 INFO L225 Difference]: With dead ends: 694 [2022-02-15 14:41:08,364 INFO L226 Difference]: Without dead ends: 679 [2022-02-15 14:41:08,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 10 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=535, Invalid=4157, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:41:08,364 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 206 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:08,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 282 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-02-15 14:41:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 402. [2022-02-15 14:41:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2022-02-15 14:41:08,371 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2022-02-15 14:41:08,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:08,371 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2022-02-15 14:41:08,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 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) [2022-02-15 14:41:08,371 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2022-02-15 14:41:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:08,372 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:08,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:08,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-15 14:41:08,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:08,572 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1078055903, now seen corresponding path program 45 times [2022-02-15 14:41:08,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:08,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088737359] [2022-02-15 14:41:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:08,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:08,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:08,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088737359] [2022-02-15 14:41:08,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088737359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:08,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134052023] [2022-02-15 14:41:08,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:41:08,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:08,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:08,940 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:08,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-15 14:41:08,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:41:08,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:08,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:41:08,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:09,056 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 11 treesize of output 7 [2022-02-15 14:41:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:09,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:09,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:09,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:09,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134052023] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:09,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:09,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-02-15 14:41:09,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039713087] [2022-02-15 14:41:09,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:09,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 14:41:09,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:09,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 14:41:09,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 14:41:09,892 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:11,414 INFO L93 Difference]: Finished difference Result 797 states and 1566 transitions. [2022-02-15 14:41:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:41:11,414 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:11,415 INFO L225 Difference]: With dead ends: 797 [2022-02-15 14:41:11,415 INFO L226 Difference]: Without dead ends: 760 [2022-02-15 14:41:11,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 13 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=455, Invalid=3451, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 14:41:11,416 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 193 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:11,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 340 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-02-15 14:41:11,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 400. [2022-02-15 14:41:11,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.007518796992481) internal successors, (801), 399 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 801 transitions. [2022-02-15 14:41:11,423 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 801 transitions. Word has length 30 [2022-02-15 14:41:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:11,423 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 801 transitions. [2022-02-15 14:41:11,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 801 transitions. [2022-02-15 14:41:11,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:11,423 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:11,424 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:11,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:11,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:11,624 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash -156353763, now seen corresponding path program 46 times [2022-02-15 14:41:11,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:11,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907553352] [2022-02-15 14:41:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:11,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:11,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:11,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907553352] [2022-02-15 14:41:11,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907553352] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:11,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123135579] [2022-02-15 14:41:11,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:41:11,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:11,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:11,941 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:11,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-15 14:41:11,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:41:11,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:11,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:41:11,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:12,052 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 11 treesize of output 7 [2022-02-15 14:41:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:12,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:12,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:12,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:12,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123135579] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:12,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:12,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-02-15 14:41:12,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836055037] [2022-02-15 14:41:12,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:12,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 14:41:12,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:12,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 14:41:12,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 14:41:12,850 INFO L87 Difference]: Start difference. First operand 400 states and 801 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:14,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:14,301 INFO L93 Difference]: Finished difference Result 782 states and 1544 transitions. [2022-02-15 14:41:14,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:41:14,302 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:14,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:14,303 INFO L225 Difference]: With dead ends: 782 [2022-02-15 14:41:14,303 INFO L226 Difference]: Without dead ends: 739 [2022-02-15 14:41:14,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 31 SyntacticMatches, 12 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=444, Invalid=3588, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 14:41:14,304 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 181 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:14,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 319 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:41:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-02-15 14:41:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 388. [2022-02-15 14:41:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2022-02-15 14:41:14,311 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2022-02-15 14:41:14,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:14,312 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2022-02-15 14:41:14,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2022-02-15 14:41:14,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:14,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:14,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:14,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:14,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:14,527 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:14,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash -970774179, now seen corresponding path program 47 times [2022-02-15 14:41:14,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:14,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058923278] [2022-02-15 14:41:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:14,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:14,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:14,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058923278] [2022-02-15 14:41:14,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058923278] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:14,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390096685] [2022-02-15 14:41:14,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:41:14,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:14,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:14,841 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:14,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-15 14:41:14,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:41:14,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:14,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:41:14,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:14,939 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 11 treesize of output 7 [2022-02-15 14:41:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:15,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:15,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:15,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:15,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390096685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:15,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:15,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-02-15 14:41:15,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508063545] [2022-02-15 14:41:15,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:15,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 14:41:15,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 14:41:15,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 14:41:15,734 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2022-02-15 14:41:17,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:17,194 INFO L93 Difference]: Finished difference Result 793 states and 1557 transitions. [2022-02-15 14:41:17,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:41:17,195 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:17,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:17,196 INFO L225 Difference]: With dead ends: 793 [2022-02-15 14:41:17,196 INFO L226 Difference]: Without dead ends: 784 [2022-02-15 14:41:17,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=3371, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:41:17,197 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:17,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 297 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-02-15 14:41:17,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 405. [2022-02-15 14:41:17,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2022-02-15 14:41:17,205 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2022-02-15 14:41:17,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:17,205 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2022-02-15 14:41:17,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2022-02-15 14:41:17,206 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2022-02-15 14:41:17,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:17,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:17,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:17,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:17,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-15 14:41:17,419 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:17,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash -88708455, now seen corresponding path program 48 times [2022-02-15 14:41:17,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:17,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352739938] [2022-02-15 14:41:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:17,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:17,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:17,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352739938] [2022-02-15 14:41:17,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352739938] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:17,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233704432] [2022-02-15 14:41:17,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:41:17,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:17,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:17,771 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:17,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-15 14:41:17,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:41:17,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:17,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:41:17,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:17,903 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 11 treesize of output 7 [2022-02-15 14:41:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:18,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:18,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:18,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:18,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233704432] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:18,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:18,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-02-15 14:41:18,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249746113] [2022-02-15 14:41:18,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:18,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 14:41:18,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 14:41:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 14:41:18,834 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2022-02-15 14:41:20,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:20,586 INFO L93 Difference]: Finished difference Result 690 states and 1367 transitions. [2022-02-15 14:41:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 14:41:20,586 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:20,587 INFO L225 Difference]: With dead ends: 690 [2022-02-15 14:41:20,587 INFO L226 Difference]: Without dead ends: 675 [2022-02-15 14:41:20,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 12 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=444, Invalid=3338, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:41:20,588 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 180 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:20,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 333 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:20,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-02-15 14:41:20,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 403. [2022-02-15 14:41:20,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0074626865671643) internal successors, (807), 402 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:20,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 807 transitions. [2022-02-15 14:41:20,593 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 807 transitions. Word has length 30 [2022-02-15 14:41:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:20,593 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 807 transitions. [2022-02-15 14:41:20,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2022-02-15 14:41:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 807 transitions. [2022-02-15 14:41:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:20,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:20,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:20,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:20,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-02-15 14:41:20,794 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:20,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:20,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1379958263, now seen corresponding path program 49 times [2022-02-15 14:41:20,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:20,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504817459] [2022-02-15 14:41:20,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:20,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:21,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:21,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504817459] [2022-02-15 14:41:21,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504817459] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:21,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70734284] [2022-02-15 14:41:21,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:41:21,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:21,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:21,107 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:21,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-15 14:41:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:21,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:41:21,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:21,206 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 11 treesize of output 7 [2022-02-15 14:41:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:21,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:21,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:21,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:21,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70734284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:21,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:21,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-02-15 14:41:21,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113012582] [2022-02-15 14:41:21,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:21,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 14:41:21,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:21,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 14:41:21,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-02-15 14:41:21,973 INFO L87 Difference]: Start difference. First operand 403 states and 807 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:23,540 INFO L93 Difference]: Finished difference Result 813 states and 1592 transitions. [2022-02-15 14:41:23,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:41:23,540 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:23,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:23,541 INFO L225 Difference]: With dead ends: 813 [2022-02-15 14:41:23,541 INFO L226 Difference]: Without dead ends: 776 [2022-02-15 14:41:23,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 14 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=445, Invalid=3461, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 14:41:23,542 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 202 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:23,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 320 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:41:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-02-15 14:41:23,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 401. [2022-02-15 14:41:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0075) internal successors, (803), 400 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 803 transitions. [2022-02-15 14:41:23,552 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 803 transitions. Word has length 30 [2022-02-15 14:41:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:23,552 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 803 transitions. [2022-02-15 14:41:23,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 803 transitions. [2022-02-15 14:41:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:23,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:23,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:23,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:23,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-02-15 14:41:23,753 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1993306893, now seen corresponding path program 50 times [2022-02-15 14:41:23,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:23,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543641800] [2022-02-15 14:41:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:23,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:24,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:24,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543641800] [2022-02-15 14:41:24,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543641800] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:24,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323388908] [2022-02-15 14:41:24,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:41:24,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:24,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:24,057 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:24,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-15 14:41:24,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:41:24,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:24,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:41:24,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:24,152 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 11 treesize of output 7 [2022-02-15 14:41:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:24,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:24,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:24,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-02-15 14:41:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:25,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323388908] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:25,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:25,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-02-15 14:41:25,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583841255] [2022-02-15 14:41:25,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:25,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 14:41:25,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:25,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 14:41:25,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 14:41:25,051 INFO L87 Difference]: Start difference. First operand 401 states and 803 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 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) [2022-02-15 14:41:26,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:26,538 INFO L93 Difference]: Finished difference Result 818 states and 1601 transitions. [2022-02-15 14:41:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:41:26,539 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:26,541 INFO L225 Difference]: With dead ends: 818 [2022-02-15 14:41:26,541 INFO L226 Difference]: Without dead ends: 775 [2022-02-15 14:41:26,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 12 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=501, Invalid=3789, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 14:41:26,541 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 199 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:26,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 380 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1399 Invalid, 0 Unknown, 211 Unchecked, 0.6s Time] [2022-02-15 14:41:26,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-02-15 14:41:26,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 389. [2022-02-15 14:41:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:26,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2022-02-15 14:41:26,549 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2022-02-15 14:41:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:26,549 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2022-02-15 14:41:26,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 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) [2022-02-15 14:41:26,550 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2022-02-15 14:41:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:26,550 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:26,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:26,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:26,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:26,772 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:26,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1026634883, now seen corresponding path program 51 times [2022-02-15 14:41:26,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:26,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125301490] [2022-02-15 14:41:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:26,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:27,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:27,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125301490] [2022-02-15 14:41:27,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125301490] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:27,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988235612] [2022-02-15 14:41:27,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:41:27,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:27,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:27,110 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:27,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-15 14:41:27,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:41:27,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:27,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:41:27,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:27,206 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 11 treesize of output 7 [2022-02-15 14:41:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:27,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:27,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:27,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:28,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988235612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:28,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:28,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-15 14:41:28,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331276800] [2022-02-15 14:41:28,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:28,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 14:41:28,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:28,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 14:41:28,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:41:28,074 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-02-15 14:41:30,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:30,111 INFO L93 Difference]: Finished difference Result 857 states and 1684 transitions. [2022-02-15 14:41:30,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:41:30,112 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:30,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:30,113 INFO L225 Difference]: With dead ends: 857 [2022-02-15 14:41:30,113 INFO L226 Difference]: Without dead ends: 848 [2022-02-15 14:41:30,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=577, Invalid=4679, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 14:41:30,114 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 208 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:30,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 337 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:41:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-02-15 14:41:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 403. [2022-02-15 14:41:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2022-02-15 14:41:30,120 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2022-02-15 14:41:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:30,120 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2022-02-15 14:41:30,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-02-15 14:41:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2022-02-15 14:41:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:30,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:30,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:30,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:30,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:30,322 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:30,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1908700607, now seen corresponding path program 52 times [2022-02-15 14:41:30,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:30,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217493479] [2022-02-15 14:41:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:30,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:30,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:30,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217493479] [2022-02-15 14:41:30,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217493479] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:30,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620669169] [2022-02-15 14:41:30,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:41:30,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:30,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:30,631 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:30,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-15 14:41:30,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:41:30,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:30,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:41:30,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:30,725 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 11 treesize of output 7 [2022-02-15 14:41:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:31,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:31,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:31,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:31,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620669169] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:31,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:31,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-15 14:41:31,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031275239] [2022-02-15 14:41:31,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:31,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 14:41:31,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:31,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 14:41:31,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:41:31,604 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-02-15 14:41:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:34,224 INFO L93 Difference]: Finished difference Result 1007 states and 1970 transitions. [2022-02-15 14:41:34,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 14:41:34,225 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:34,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:34,226 INFO L225 Difference]: With dead ends: 1007 [2022-02-15 14:41:34,226 INFO L226 Difference]: Without dead ends: 990 [2022-02-15 14:41:34,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 30 SyntacticMatches, 15 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=712, Invalid=5294, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 14:41:34,227 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 207 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:34,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 383 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1830 Invalid, 0 Unknown, 81 Unchecked, 0.8s Time] [2022-02-15 14:41:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-02-15 14:41:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 401. [2022-02-15 14:41:34,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0125) internal successors, (805), 400 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 805 transitions. [2022-02-15 14:41:34,235 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 805 transitions. Word has length 30 [2022-02-15 14:41:34,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:34,235 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 805 transitions. [2022-02-15 14:41:34,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-02-15 14:41:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 805 transitions. [2022-02-15 14:41:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:34,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:34,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:34,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:34,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-15 14:41:34,436 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:34,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash -917599971, now seen corresponding path program 53 times [2022-02-15 14:41:34,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:34,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096599145] [2022-02-15 14:41:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:34,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:34,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:34,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096599145] [2022-02-15 14:41:34,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096599145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:34,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974757227] [2022-02-15 14:41:34,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:41:34,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:34,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:34,737 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:34,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-15 14:41:34,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:41:34,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:34,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:41:34,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:34,832 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 11 treesize of output 7 [2022-02-15 14:41:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:35,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:35,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:35,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:35,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974757227] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:35,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:35,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2022-02-15 14:41:35,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214363675] [2022-02-15 14:41:35,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:35,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 14:41:35,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:35,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 14:41:35,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 14:41:35,648 INFO L87 Difference]: Start difference. First operand 401 states and 805 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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) [2022-02-15 14:41:37,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:37,790 INFO L93 Difference]: Finished difference Result 877 states and 1721 transitions. [2022-02-15 14:41:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 14:41:37,790 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:37,791 INFO L225 Difference]: With dead ends: 877 [2022-02-15 14:41:37,791 INFO L226 Difference]: Without dead ends: 816 [2022-02-15 14:41:37,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=648, Invalid=5052, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 14:41:37,792 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 251 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:37,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 351 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:41:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-02-15 14:41:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 400. [2022-02-15 14:41:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.9974937343358397) internal successors, (797), 399 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 797 transitions. [2022-02-15 14:41:37,799 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 797 transitions. Word has length 30 [2022-02-15 14:41:37,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:37,799 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 797 transitions. [2022-02-15 14:41:37,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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) [2022-02-15 14:41:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 797 transitions. [2022-02-15 14:41:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:37,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:37,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:37,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:38,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-02-15 14:41:38,001 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:38,001 INFO L85 PathProgramCache]: Analyzing trace with hash -28981581, now seen corresponding path program 54 times [2022-02-15 14:41:38,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:38,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56659064] [2022-02-15 14:41:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:38,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:38,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:38,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56659064] [2022-02-15 14:41:38,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56659064] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:38,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320010396] [2022-02-15 14:41:38,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:41:38,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:38,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:38,302 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:38,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-15 14:41:38,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:41:38,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:38,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:41:38,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:38,432 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 11 treesize of output 7 [2022-02-15 14:41:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:38,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:39,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:39,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:39,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320010396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:39,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:39,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-15 14:41:39,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335151509] [2022-02-15 14:41:39,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:39,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 14:41:39,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:39,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 14:41:39,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:41:39,313 INFO L87 Difference]: Start difference. First operand 400 states and 797 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-02-15 14:41:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:40,660 INFO L93 Difference]: Finished difference Result 771 states and 1511 transitions. [2022-02-15 14:41:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:41:40,660 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:40,661 INFO L225 Difference]: With dead ends: 771 [2022-02-15 14:41:40,661 INFO L226 Difference]: Without dead ends: 762 [2022-02-15 14:41:40,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=364, Invalid=3058, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 14:41:40,662 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 150 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:40,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 327 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:41:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-02-15 14:41:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 402. [2022-02-15 14:41:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.9950124688279303) internal successors, (800), 401 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 800 transitions. [2022-02-15 14:41:40,669 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 800 transitions. Word has length 30 [2022-02-15 14:41:40,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:40,669 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 800 transitions. [2022-02-15 14:41:40,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-02-15 14:41:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 800 transitions. [2022-02-15 14:41:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:40,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:40,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:40,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-15 14:41:40,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:40,871 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:40,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:40,871 INFO L85 PathProgramCache]: Analyzing trace with hash 853084143, now seen corresponding path program 55 times [2022-02-15 14:41:40,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:40,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098695333] [2022-02-15 14:41:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:40,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:41,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:41,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098695333] [2022-02-15 14:41:41,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098695333] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:41,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306495634] [2022-02-15 14:41:41,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:41:41,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:41,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:41,185 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:41,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-15 14:41:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:41,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:41:41,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:41,287 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 11 treesize of output 7 [2022-02-15 14:41:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:41,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:42,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:42,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:42,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306495634] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:42,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:42,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-15 14:41:42,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92168653] [2022-02-15 14:41:42,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:42,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 14:41:42,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 14:41:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:41:42,203 INFO L87 Difference]: Start difference. First operand 402 states and 800 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-02-15 14:41:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:43,641 INFO L93 Difference]: Finished difference Result 658 states and 1301 transitions. [2022-02-15 14:41:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:41:43,642 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:43,643 INFO L225 Difference]: With dead ends: 658 [2022-02-15 14:41:43,643 INFO L226 Difference]: Without dead ends: 635 [2022-02-15 14:41:43,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=390, Invalid=3032, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 14:41:43,643 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:43,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 270 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:41:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-02-15 14:41:43,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 392. [2022-02-15 14:41:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2022-02-15 14:41:43,651 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2022-02-15 14:41:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:43,652 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2022-02-15 14:41:43,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-02-15 14:41:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2022-02-15 14:41:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:43,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:43,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:43,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:43,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-15 14:41:43,853 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:43,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:43,853 INFO L85 PathProgramCache]: Analyzing trace with hash -24923507, now seen corresponding path program 56 times [2022-02-15 14:41:43,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:43,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253703139] [2022-02-15 14:41:43,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:43,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:44,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:44,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253703139] [2022-02-15 14:41:44,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253703139] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:44,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868575310] [2022-02-15 14:41:44,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:41:44,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:44,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:44,201 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:44,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-15 14:41:44,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:41:44,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:44,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:41:44,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:44,296 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 15 treesize of output 7 [2022-02-15 14:41:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:44,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:45,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:45,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:45,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868575310] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:45,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:45,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-15 14:41:45,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166510246] [2022-02-15 14:41:45,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:45,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 14:41:45,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:45,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 14:41:45,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:41:45,150 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2022-02-15 14:41:46,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:46,602 INFO L93 Difference]: Finished difference Result 768 states and 1515 transitions. [2022-02-15 14:41:46,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:41:46,602 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:46,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:46,603 INFO L225 Difference]: With dead ends: 768 [2022-02-15 14:41:46,603 INFO L226 Difference]: Without dead ends: 735 [2022-02-15 14:41:46,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=374, Invalid=3166, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 14:41:46,603 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 140 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:46,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 527 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:41:46,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-02-15 14:41:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 388. [2022-02-15 14:41:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:46,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2022-02-15 14:41:46,610 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2022-02-15 14:41:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:46,610 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2022-02-15 14:41:46,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2022-02-15 14:41:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2022-02-15 14:41:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:46,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:46,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:46,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:46,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-15 14:41:46,827 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:46,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1032283343, now seen corresponding path program 57 times [2022-02-15 14:41:46,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:46,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412844707] [2022-02-15 14:41:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:46,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:47,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:47,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412844707] [2022-02-15 14:41:47,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412844707] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:47,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522663839] [2022-02-15 14:41:47,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:41:47,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:47,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:47,193 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:47,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-15 14:41:47,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:41:47,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:47,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:41:47,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:47,367 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 11 treesize of output 7 [2022-02-15 14:41:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:47,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:48,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:48,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:48,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522663839] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:48,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:48,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:41:48,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654942748] [2022-02-15 14:41:48,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:48,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:41:48,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:48,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:41:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:41:48,262 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:50,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:50,023 INFO L93 Difference]: Finished difference Result 801 states and 1571 transitions. [2022-02-15 14:41:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:41:50,024 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:50,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:50,025 INFO L225 Difference]: With dead ends: 801 [2022-02-15 14:41:50,025 INFO L226 Difference]: Without dead ends: 792 [2022-02-15 14:41:50,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=503, Invalid=4609, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 14:41:50,026 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 177 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:50,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 432 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:41:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-02-15 14:41:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 406. [2022-02-15 14:41:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2022-02-15 14:41:50,032 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2022-02-15 14:41:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:50,032 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2022-02-15 14:41:50,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2022-02-15 14:41:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:50,033 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:50,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:50,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:50,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-15 14:41:50,234 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:50,234 INFO L85 PathProgramCache]: Analyzing trace with hash -150217619, now seen corresponding path program 58 times [2022-02-15 14:41:50,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:50,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626827178] [2022-02-15 14:41:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:50,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:50,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:50,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626827178] [2022-02-15 14:41:50,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626827178] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:50,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665984204] [2022-02-15 14:41:50,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:41:50,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:50,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:50,564 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:50,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-15 14:41:50,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:41:50,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:50,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:41:50,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:50,727 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 11 treesize of output 7 [2022-02-15 14:41:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:51,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:51,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:51,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:51,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665984204] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:51,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:51,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:41:51,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931117863] [2022-02-15 14:41:51,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:51,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:41:51,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:41:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:41:51,646 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:53,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:53,644 INFO L93 Difference]: Finished difference Result 698 states and 1381 transitions. [2022-02-15 14:41:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:41:53,644 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:53,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:53,645 INFO L225 Difference]: With dead ends: 698 [2022-02-15 14:41:53,645 INFO L226 Difference]: Without dead ends: 683 [2022-02-15 14:41:53,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=538, Invalid=4574, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 14:41:53,645 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 183 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 2000 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:53,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 415 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2000 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:41:53,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-02-15 14:41:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 404. [2022-02-15 14:41:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2022-02-15 14:41:53,650 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2022-02-15 14:41:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:53,651 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2022-02-15 14:41:53,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:53,651 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2022-02-15 14:41:53,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:53,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:53,651 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:53,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:53,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-02-15 14:41:53,852 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1318449099, now seen corresponding path program 59 times [2022-02-15 14:41:53,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:53,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060356143] [2022-02-15 14:41:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:53,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:54,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:54,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060356143] [2022-02-15 14:41:54,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060356143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:54,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389141583] [2022-02-15 14:41:54,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:41:54,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:54,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:54,168 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:54,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-15 14:41:54,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:41:54,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:54,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:41:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:54,327 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 11 treesize of output 7 [2022-02-15 14:41:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:54,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:55,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:55,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:55,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389141583] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:55,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:55,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:41:55,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722917710] [2022-02-15 14:41:55,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:55,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:41:55,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:41:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:41:55,261 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:57,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:57,317 INFO L93 Difference]: Finished difference Result 828 states and 1621 transitions. [2022-02-15 14:41:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 14:41:57,317 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:41:57,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:57,318 INFO L225 Difference]: With dead ends: 828 [2022-02-15 14:41:57,318 INFO L226 Difference]: Without dead ends: 791 [2022-02-15 14:41:57,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=555, Invalid=4847, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 14:41:57,318 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 168 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:57,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 575 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2279 Invalid, 0 Unknown, 134 Unchecked, 0.9s Time] [2022-02-15 14:41:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-15 14:41:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 402. [2022-02-15 14:41:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2022-02-15 14:41:57,324 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2022-02-15 14:41:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:57,324 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2022-02-15 14:41:57,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2022-02-15 14:41:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:41:57,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:57,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:57,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-15 14:41:57,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:57,525 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:41:57,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:57,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2054816057, now seen corresponding path program 60 times [2022-02-15 14:41:57,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:57,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442222770] [2022-02-15 14:41:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:57,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:57,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:57,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442222770] [2022-02-15 14:41:57,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442222770] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:57,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004270667] [2022-02-15 14:41:57,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:41:57,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:57,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:57,890 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:57,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-15 14:41:57,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:41:57,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:57,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:41:57,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:58,053 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 11 treesize of output 7 [2022-02-15 14:41:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:58,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:58,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:58,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:41:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:58,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004270667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:58,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:58,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:41:58,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154990700] [2022-02-15 14:41:58,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:58,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:41:58,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:58,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:41:58,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:41:58,960 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:00,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:00,035 INFO L93 Difference]: Finished difference Result 677 states and 1337 transitions. [2022-02-15 14:42:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:42:00,035 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:00,036 INFO L225 Difference]: With dead ends: 677 [2022-02-15 14:42:00,036 INFO L226 Difference]: Without dead ends: 662 [2022-02-15 14:42:00,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=2945, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 14:42:00,036 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 156 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:00,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 483 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1314 Invalid, 0 Unknown, 112 Unchecked, 0.5s Time] [2022-02-15 14:42:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-02-15 14:42:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 416. [2022-02-15 14:42:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9903614457831325) internal successors, (826), 415 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 826 transitions. [2022-02-15 14:42:00,041 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 826 transitions. Word has length 30 [2022-02-15 14:42:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:00,042 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 826 transitions. [2022-02-15 14:42:00,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 826 transitions. [2022-02-15 14:42:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:00,042 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:00,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:00,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-02-15 14:42:00,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:00,243 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:00,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1077374521, now seen corresponding path program 61 times [2022-02-15 14:42:00,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:00,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942593204] [2022-02-15 14:42:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:00,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:00,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:00,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942593204] [2022-02-15 14:42:00,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942593204] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:00,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520936901] [2022-02-15 14:42:00,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:42:00,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:00,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:00,577 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:00,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-15 14:42:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:00,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:00,740 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 11 treesize of output 7 [2022-02-15 14:42:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:01,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:01,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:01,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:01,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520936901] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:01,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:01,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:42:01,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104891500] [2022-02-15 14:42:01,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:01,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:42:01,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:01,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:42:01,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:42:01,637 INFO L87 Difference]: Start difference. First operand 416 states and 826 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:03,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:03,284 INFO L93 Difference]: Finished difference Result 795 states and 1565 transitions. [2022-02-15 14:42:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:42:03,284 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:03,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:03,285 INFO L225 Difference]: With dead ends: 795 [2022-02-15 14:42:03,285 INFO L226 Difference]: Without dead ends: 764 [2022-02-15 14:42:03,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=533, Invalid=4723, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 14:42:03,286 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 167 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:03,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 408 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1484 Invalid, 0 Unknown, 123 Unchecked, 0.6s Time] [2022-02-15 14:42:03,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-02-15 14:42:03,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 390. [2022-02-15 14:42:03,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.0102827763496145) internal successors, (782), 389 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 782 transitions. [2022-02-15 14:42:03,293 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 782 transitions. Word has length 30 [2022-02-15 14:42:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:03,293 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 782 transitions. [2022-02-15 14:42:03,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 782 transitions. [2022-02-15 14:42:03,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:03,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:03,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:03,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:03,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:03,517 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:03,517 INFO L85 PathProgramCache]: Analyzing trace with hash 965125719, now seen corresponding path program 62 times [2022-02-15 14:42:03,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:03,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388612693] [2022-02-15 14:42:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:03,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:03,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:03,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388612693] [2022-02-15 14:42:03,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388612693] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:03,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055227118] [2022-02-15 14:42:03,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:42:03,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:03,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:03,896 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:03,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-15 14:42:03,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:42:03,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:03,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:03,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:04,091 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 11 treesize of output 7 [2022-02-15 14:42:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:04,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:05,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:05,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-02-15 14:42:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:05,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055227118] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:05,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:05,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-02-15 14:42:05,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213930195] [2022-02-15 14:42:05,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:05,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 14:42:05,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:05,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 14:42:05,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:42:05,107 INFO L87 Difference]: Start difference. First operand 390 states and 782 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:07,652 INFO L93 Difference]: Finished difference Result 952 states and 1864 transitions. [2022-02-15 14:42:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 14:42:07,652 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:07,654 INFO L225 Difference]: With dead ends: 952 [2022-02-15 14:42:07,654 INFO L226 Difference]: Without dead ends: 943 [2022-02-15 14:42:07,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=969, Invalid=7221, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 14:42:07,654 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 284 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:07,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 425 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:42:07,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-02-15 14:42:07,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 404. [2022-02-15 14:42:07,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0124069478908186) internal successors, (811), 403 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 811 transitions. [2022-02-15 14:42:07,660 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 811 transitions. Word has length 30 [2022-02-15 14:42:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:07,661 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 811 transitions. [2022-02-15 14:42:07,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 811 transitions. [2022-02-15 14:42:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:07,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:07,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:07,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:07,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-02-15 14:42:07,862 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1847191443, now seen corresponding path program 63 times [2022-02-15 14:42:07,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:07,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574235547] [2022-02-15 14:42:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:07,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:08,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:08,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574235547] [2022-02-15 14:42:08,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574235547] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:08,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611951230] [2022-02-15 14:42:08,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:42:08,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:08,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:08,178 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:08,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-15 14:42:08,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:42:08,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:08,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:42:08,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:08,339 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 11 treesize of output 7 [2022-02-15 14:42:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:08,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:09,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:09,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:09,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611951230] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:09,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:09,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:42:09,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985730441] [2022-02-15 14:42:09,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:09,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:42:09,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:09,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:42:09,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:42:09,330 INFO L87 Difference]: Start difference. First operand 404 states and 811 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:11,699 INFO L93 Difference]: Finished difference Result 742 states and 1466 transitions. [2022-02-15 14:42:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:42:11,699 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:11,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:11,700 INFO L225 Difference]: With dead ends: 742 [2022-02-15 14:42:11,700 INFO L226 Difference]: Without dead ends: 727 [2022-02-15 14:42:11,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=680, Invalid=5482, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:42:11,701 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:11,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 365 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:42:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-02-15 14:42:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 402. [2022-02-15 14:42:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2022-02-15 14:42:11,706 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2022-02-15 14:42:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:11,706 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2022-02-15 14:42:11,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2022-02-15 14:42:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:11,707 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:11,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:11,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-15 14:42:11,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:11,908 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:11,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:11,908 INFO L85 PathProgramCache]: Analyzing trace with hash -979109135, now seen corresponding path program 64 times [2022-02-15 14:42:11,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:11,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616849475] [2022-02-15 14:42:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:11,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:12,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:12,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616849475] [2022-02-15 14:42:12,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616849475] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:12,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942828099] [2022-02-15 14:42:12,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:42:12,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:12,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:12,223 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:12,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-15 14:42:12,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:42:12,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:12,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:12,405 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 11 treesize of output 7 [2022-02-15 14:42:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:12,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:13,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:13,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:13,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942828099] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:13,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:13,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:42:13,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478291223] [2022-02-15 14:42:13,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:13,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:42:13,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:13,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:42:13,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:42:13,245 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:15,568 INFO L93 Difference]: Finished difference Result 889 states and 1746 transitions. [2022-02-15 14:42:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 14:42:15,568 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:15,569 INFO L225 Difference]: With dead ends: 889 [2022-02-15 14:42:15,569 INFO L226 Difference]: Without dead ends: 828 [2022-02-15 14:42:15,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=668, Invalid=5494, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:42:15,570 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 213 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:15,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 511 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2209 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:42:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-02-15 14:42:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 401. [2022-02-15 14:42:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.9975) internal successors, (799), 400 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 799 transitions. [2022-02-15 14:42:15,576 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 799 transitions. Word has length 30 [2022-02-15 14:42:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:15,576 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 799 transitions. [2022-02-15 14:42:15,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 799 transitions. [2022-02-15 14:42:15,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:15,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:15,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:15,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:15,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:15,777 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:15,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:15,777 INFO L85 PathProgramCache]: Analyzing trace with hash -90490745, now seen corresponding path program 65 times [2022-02-15 14:42:15,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:15,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241436628] [2022-02-15 14:42:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:15,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:16,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:16,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241436628] [2022-02-15 14:42:16,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241436628] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:16,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450467783] [2022-02-15 14:42:16,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:42:16,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:16,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:16,094 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:16,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-15 14:42:16,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:42:16,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:16,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:16,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:16,262 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 11 treesize of output 7 [2022-02-15 14:42:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:16,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:17,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:17,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:17,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450467783] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:17,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:17,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:42:17,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551755105] [2022-02-15 14:42:17,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:17,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:42:17,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:17,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:42:17,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:42:17,169 INFO L87 Difference]: Start difference. First operand 401 states and 799 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:18,614 INFO L93 Difference]: Finished difference Result 773 states and 1515 transitions. [2022-02-15 14:42:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:42:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:18,615 INFO L225 Difference]: With dead ends: 773 [2022-02-15 14:42:18,615 INFO L226 Difference]: Without dead ends: 764 [2022-02-15 14:42:18,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=400, Invalid=3632, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 14:42:18,616 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 123 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:18,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 491 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:42:18,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-02-15 14:42:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 403. [2022-02-15 14:42:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9950248756218905) internal successors, (802), 402 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 802 transitions. [2022-02-15 14:42:18,621 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 802 transitions. Word has length 30 [2022-02-15 14:42:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:18,621 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 802 transitions. [2022-02-15 14:42:18,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 802 transitions. [2022-02-15 14:42:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:18,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:18,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:18,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:18,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-15 14:42:18,822 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:18,822 INFO L85 PathProgramCache]: Analyzing trace with hash 791574979, now seen corresponding path program 66 times [2022-02-15 14:42:18,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:18,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885773624] [2022-02-15 14:42:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:18,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:19,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:19,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885773624] [2022-02-15 14:42:19,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885773624] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:19,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562061869] [2022-02-15 14:42:19,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:42:19,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:19,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:19,151 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:19,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-15 14:42:19,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:42:19,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:19,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:19,315 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 11 treesize of output 7 [2022-02-15 14:42:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:19,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:20,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:20,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:20,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562061869] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:20,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:20,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:42:20,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479298121] [2022-02-15 14:42:20,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:20,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:42:20,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:20,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:42:20,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:42:20,246 INFO L87 Difference]: Start difference. First operand 403 states and 802 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:21,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:21,740 INFO L93 Difference]: Finished difference Result 662 states and 1309 transitions. [2022-02-15 14:42:21,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:42:21,741 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:21,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:21,742 INFO L225 Difference]: With dead ends: 662 [2022-02-15 14:42:21,742 INFO L226 Difference]: Without dead ends: 639 [2022-02-15 14:42:21,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=424, Invalid=3608, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 14:42:21,742 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 138 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:21,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 349 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1567 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:42:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-02-15 14:42:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 393. [2022-02-15 14:42:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.00765306122449) internal successors, (787), 392 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 787 transitions. [2022-02-15 14:42:21,747 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 787 transitions. Word has length 30 [2022-02-15 14:42:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:21,747 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 787 transitions. [2022-02-15 14:42:21,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 787 transitions. [2022-02-15 14:42:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:21,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:21,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:21,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:21,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-15 14:42:21,948 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash -86432671, now seen corresponding path program 67 times [2022-02-15 14:42:21,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:21,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394000922] [2022-02-15 14:42:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:21,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:22,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:22,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394000922] [2022-02-15 14:42:22,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394000922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:22,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957816419] [2022-02-15 14:42:22,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:42:22,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:22,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:22,260 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:22,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-15 14:42:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:22,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:22,422 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 11 treesize of output 7 [2022-02-15 14:42:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:22,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:23,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:23,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:23,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957816419] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:23,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:23,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:42:23,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125114909] [2022-02-15 14:42:23,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:23,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:42:23,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:23,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:42:23,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:42:23,322 INFO L87 Difference]: Start difference. First operand 393 states and 787 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:24,706 INFO L93 Difference]: Finished difference Result 781 states and 1542 transitions. [2022-02-15 14:42:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:42:24,706 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:24,707 INFO L225 Difference]: With dead ends: 781 [2022-02-15 14:42:24,707 INFO L226 Difference]: Without dead ends: 748 [2022-02-15 14:42:24,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=407, Invalid=3499, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 14:42:24,708 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 145 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:24,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 477 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:42:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-02-15 14:42:24,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 389. [2022-02-15 14:42:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2022-02-15 14:42:24,713 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2022-02-15 14:42:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:24,713 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2022-02-15 14:42:24,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2022-02-15 14:42:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:24,714 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:24,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:24,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:24,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:24,929 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:24,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:24,929 INFO L85 PathProgramCache]: Analyzing trace with hash -255678137, now seen corresponding path program 68 times [2022-02-15 14:42:24,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:24,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894851604] [2022-02-15 14:42:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:24,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:25,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:25,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894851604] [2022-02-15 14:42:25,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894851604] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:25,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703352641] [2022-02-15 14:42:25,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:42:25,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:25,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:25,297 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:25,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-15 14:42:25,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:42:25,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:25,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:25,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:25,456 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 11 treesize of output 7 [2022-02-15 14:42:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:25,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:26,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:26,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-02-15 14:42:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:26,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703352641] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:26,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:26,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-02-15 14:42:26,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237359112] [2022-02-15 14:42:26,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:26,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 14:42:26,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:26,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 14:42:26,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:42:26,462 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:29,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:29,045 INFO L93 Difference]: Finished difference Result 928 states and 1820 transitions. [2022-02-15 14:42:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 14:42:29,045 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:29,046 INFO L225 Difference]: With dead ends: 928 [2022-02-15 14:42:29,046 INFO L226 Difference]: Without dead ends: 919 [2022-02-15 14:42:29,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2860 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1089, Invalid=7653, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 14:42:29,047 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 285 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:29,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 404 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:42:29,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-02-15 14:42:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 404. [2022-02-15 14:42:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0148883374689825) internal successors, (812), 403 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 812 transitions. [2022-02-15 14:42:29,053 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 812 transitions. Word has length 30 [2022-02-15 14:42:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:29,053 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 812 transitions. [2022-02-15 14:42:29,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 812 transitions. [2022-02-15 14:42:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:29,054 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:29,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:29,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:29,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:29,254 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:29,255 INFO L85 PathProgramCache]: Analyzing trace with hash 626387587, now seen corresponding path program 69 times [2022-02-15 14:42:29,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:29,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930092369] [2022-02-15 14:42:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:29,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:29,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:29,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930092369] [2022-02-15 14:42:29,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930092369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:29,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473022762] [2022-02-15 14:42:29,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:42:29,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:29,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:29,573 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:29,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-15 14:42:29,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:42:29,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:29,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:42:29,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:29,735 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 11 treesize of output 7 [2022-02-15 14:42:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:30,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:30,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:30,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:30,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473022762] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:30,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:30,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:42:30,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617320802] [2022-02-15 14:42:30,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:30,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:42:30,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:30,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:42:30,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:42:30,710 INFO L87 Difference]: Start difference. First operand 404 states and 812 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:33,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:33,228 INFO L93 Difference]: Finished difference Result 716 states and 1419 transitions. [2022-02-15 14:42:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:42:33,228 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:33,229 INFO L225 Difference]: With dead ends: 716 [2022-02-15 14:42:33,229 INFO L226 Difference]: Without dead ends: 701 [2022-02-15 14:42:33,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=728, Invalid=5592, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 14:42:33,230 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 224 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:33,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 417 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:42:33,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-02-15 14:42:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 402. [2022-02-15 14:42:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0149625935162097) internal successors, (808), 401 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 808 transitions. [2022-02-15 14:42:33,235 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 808 transitions. Word has length 30 [2022-02-15 14:42:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:33,236 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 808 transitions. [2022-02-15 14:42:33,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 808 transitions. [2022-02-15 14:42:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:33,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:33,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:33,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:33,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-02-15 14:42:33,437 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:33,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2095054305, now seen corresponding path program 70 times [2022-02-15 14:42:33,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:33,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416318793] [2022-02-15 14:42:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:33,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:33,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:33,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416318793] [2022-02-15 14:42:33,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416318793] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:33,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632020332] [2022-02-15 14:42:33,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:42:33,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:33,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:33,741 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:33,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-15 14:42:33,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:42:33,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:33,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:33,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:33,894 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 11 treesize of output 7 [2022-02-15 14:42:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:34,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:34,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:34,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:34,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632020332] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:34,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:34,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:42:34,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424450738] [2022-02-15 14:42:34,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:34,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:42:34,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:34,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:42:34,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:42:34,714 INFO L87 Difference]: Start difference. First operand 402 states and 808 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:37,264 INFO L93 Difference]: Finished difference Result 918 states and 1795 transitions. [2022-02-15 14:42:37,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 14:42:37,264 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:37,265 INFO L225 Difference]: With dead ends: 918 [2022-02-15 14:42:37,265 INFO L226 Difference]: Without dead ends: 857 [2022-02-15 14:42:37,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=806, Invalid=6504, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 14:42:37,266 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 278 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:37,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 495 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:42:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-02-15 14:42:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 401. [2022-02-15 14:42:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0) internal successors, (800), 400 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 800 transitions. [2022-02-15 14:42:37,272 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 800 transitions. Word has length 30 [2022-02-15 14:42:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:37,272 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 800 transitions. [2022-02-15 14:42:37,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 800 transitions. [2022-02-15 14:42:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:37,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:37,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:37,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:37,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:37,474 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:37,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:37,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1311294601, now seen corresponding path program 71 times [2022-02-15 14:42:37,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:37,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104884833] [2022-02-15 14:42:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:37,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:37,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:37,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104884833] [2022-02-15 14:42:37,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104884833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:37,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124770343] [2022-02-15 14:42:37,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:42:37,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:37,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:37,791 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:37,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-15 14:42:37,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:42:37,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:37,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:37,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:37,954 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 11 treesize of output 7 [2022-02-15 14:42:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:38,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:38,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:38,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:38,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124770343] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:38,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:38,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:42:38,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825546434] [2022-02-15 14:42:38,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:38,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:42:38,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:38,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:42:38,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:42:38,847 INFO L87 Difference]: Start difference. First operand 401 states and 800 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:40,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:40,603 INFO L93 Difference]: Finished difference Result 781 states and 1533 transitions. [2022-02-15 14:42:40,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:42:40,604 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:40,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:40,605 INFO L225 Difference]: With dead ends: 781 [2022-02-15 14:42:40,605 INFO L226 Difference]: Without dead ends: 772 [2022-02-15 14:42:40,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=487, Invalid=4205, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:42:40,605 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 138 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:40,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 518 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:42:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-02-15 14:42:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 403. [2022-02-15 14:42:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9975124378109452) internal successors, (803), 402 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:40,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 803 transitions. [2022-02-15 14:42:40,610 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 803 transitions. Word has length 30 [2022-02-15 14:42:40,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:40,611 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 803 transitions. [2022-02-15 14:42:40,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:40,611 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 803 transitions. [2022-02-15 14:42:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:40,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:40,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:40,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:40,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:40,812 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:40,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:40,812 INFO L85 PathProgramCache]: Analyzing trace with hash -429228877, now seen corresponding path program 72 times [2022-02-15 14:42:40,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:40,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617598240] [2022-02-15 14:42:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:40,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:41,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:41,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617598240] [2022-02-15 14:42:41,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617598240] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:41,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160512810] [2022-02-15 14:42:41,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:42:41,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:41,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:41,124 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:41,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-15 14:42:41,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:42:41,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:41,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:41,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:41,285 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 11 treesize of output 7 [2022-02-15 14:42:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:41,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:42,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:42,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:42,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160512810] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:42,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:42,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:42:42,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034063461] [2022-02-15 14:42:42,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:42,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:42:42,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:42,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:42:42,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:42:42,212 INFO L87 Difference]: Start difference. First operand 403 states and 803 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:43,911 INFO L93 Difference]: Finished difference Result 651 states and 1290 transitions. [2022-02-15 14:42:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 14:42:43,912 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:43,912 INFO L225 Difference]: With dead ends: 651 [2022-02-15 14:42:43,913 INFO L226 Difference]: Without dead ends: 628 [2022-02-15 14:42:43,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=519, Invalid=4173, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:42:43,913 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 183 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:43,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 281 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:42:43,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-02-15 14:42:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 393. [2022-02-15 14:42:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2022-02-15 14:42:43,919 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2022-02-15 14:42:43,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:43,919 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2022-02-15 14:42:43,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2022-02-15 14:42:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:43,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:43,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:43,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:44,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-02-15 14:42:44,121 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:44,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1307236527, now seen corresponding path program 73 times [2022-02-15 14:42:44,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:44,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904460551] [2022-02-15 14:42:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:44,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:44,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:44,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904460551] [2022-02-15 14:42:44,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904460551] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:44,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044631106] [2022-02-15 14:42:44,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:42:44,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:44,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:44,432 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:44,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-15 14:42:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:44,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:44,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:44,595 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 11 treesize of output 7 [2022-02-15 14:42:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:44,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:45,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:45,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:45,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044631106] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:45,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:45,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:42:45,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741854659] [2022-02-15 14:42:45,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:45,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:42:45,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:45,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:42:45,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:42:45,502 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:47,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:47,065 INFO L93 Difference]: Finished difference Result 794 states and 1569 transitions. [2022-02-15 14:42:47,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:42:47,065 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:47,066 INFO L225 Difference]: With dead ends: 794 [2022-02-15 14:42:47,066 INFO L226 Difference]: Without dead ends: 761 [2022-02-15 14:42:47,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=490, Invalid=4066, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:42:47,067 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 167 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:47,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 416 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:42:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-15 14:42:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 390. [2022-02-15 14:42:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.012853470437018) internal successors, (783), 389 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 783 transitions. [2022-02-15 14:42:47,073 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 783 transitions. Word has length 30 [2022-02-15 14:42:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:47,073 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 783 transitions. [2022-02-15 14:42:47,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 783 transitions. [2022-02-15 14:42:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:47,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:47,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:47,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:47,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:47,278 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:47,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:47,278 INFO L85 PathProgramCache]: Analyzing trace with hash -821099023, now seen corresponding path program 74 times [2022-02-15 14:42:47,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:47,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353996363] [2022-02-15 14:42:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:47,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:47,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:47,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353996363] [2022-02-15 14:42:47,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353996363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:47,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655965979] [2022-02-15 14:42:47,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:42:47,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:47,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:47,595 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:47,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-15 14:42:47,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:42:47,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:47,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:47,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:47,755 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 11 treesize of output 7 [2022-02-15 14:42:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:48,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:48,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:48,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:48,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655965979] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:48,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:48,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:42:48,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722992719] [2022-02-15 14:42:48,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:48,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:42:48,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:48,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:42:48,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:42:48,654 INFO L87 Difference]: Start difference. First operand 390 states and 783 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:49,960 INFO L93 Difference]: Finished difference Result 787 states and 1543 transitions. [2022-02-15 14:42:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:42:49,963 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:49,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:49,964 INFO L225 Difference]: With dead ends: 787 [2022-02-15 14:42:49,964 INFO L226 Difference]: Without dead ends: 778 [2022-02-15 14:42:49,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=407, Invalid=3753, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:42:49,965 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 145 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:49,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 400 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:42:49,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-02-15 14:42:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 404. [2022-02-15 14:42:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2022-02-15 14:42:49,972 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2022-02-15 14:42:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:49,972 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2022-02-15 14:42:49,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2022-02-15 14:42:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:49,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:49,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:49,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-15 14:42:50,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:50,173 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash 60966701, now seen corresponding path program 75 times [2022-02-15 14:42:50,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:50,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684333399] [2022-02-15 14:42:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:50,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:50,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:50,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684333399] [2022-02-15 14:42:50,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684333399] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:50,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162555613] [2022-02-15 14:42:50,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:42:50,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:50,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:50,491 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:50,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-15 14:42:50,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:42:50,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:50,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:50,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:50,685 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 11 treesize of output 7 [2022-02-15 14:42:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:51,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:51,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:51,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:51,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162555613] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:51,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:51,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:42:51,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117611872] [2022-02-15 14:42:51,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:51,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:42:51,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:51,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:42:51,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:42:51,675 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:53,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:53,491 INFO L93 Difference]: Finished difference Result 898 states and 1751 transitions. [2022-02-15 14:42:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:42:53,491 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:53,492 INFO L225 Difference]: With dead ends: 898 [2022-02-15 14:42:53,492 INFO L226 Difference]: Without dead ends: 881 [2022-02-15 14:42:53,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 26 SyntacticMatches, 15 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=512, Invalid=4458, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 14:42:53,493 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 158 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:53,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 410 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1645 Invalid, 0 Unknown, 79 Unchecked, 0.7s Time] [2022-02-15 14:42:53,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-02-15 14:42:53,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 402. [2022-02-15 14:42:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2022-02-15 14:42:53,503 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2022-02-15 14:42:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:53,503 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2022-02-15 14:42:53,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2022-02-15 14:42:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:53,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:53,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:53,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-02-15 14:42:53,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-02-15 14:42:53,709 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:53,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1529633419, now seen corresponding path program 76 times [2022-02-15 14:42:53,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:53,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402964074] [2022-02-15 14:42:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:53,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:54,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:54,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402964074] [2022-02-15 14:42:54,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402964074] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:54,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121390780] [2022-02-15 14:42:54,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:42:54,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:54,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:54,038 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:54,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-15 14:42:54,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:42:54,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:54,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:54,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:54,198 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 11 treesize of output 7 [2022-02-15 14:42:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:54,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:54,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:54,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:55,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121390780] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:55,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:55,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:42:55,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270709328] [2022-02-15 14:42:55,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:55,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:42:55,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:55,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:42:55,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:42:55,050 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:56,222 INFO L93 Difference]: Finished difference Result 802 states and 1580 transitions. [2022-02-15 14:42:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:42:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:56,223 INFO L225 Difference]: With dead ends: 802 [2022-02-15 14:42:56,223 INFO L226 Difference]: Without dead ends: 757 [2022-02-15 14:42:56,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=397, Invalid=3263, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 14:42:56,224 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 152 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:56,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 364 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:42:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-02-15 14:42:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 394. [2022-02-15 14:42:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:56,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2022-02-15 14:42:56,229 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2022-02-15 14:42:56,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:56,229 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2022-02-15 14:42:56,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2022-02-15 14:42:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:56,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:56,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:56,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:56,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:56,431 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:56,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:56,431 INFO L85 PathProgramCache]: Analyzing trace with hash -817040949, now seen corresponding path program 77 times [2022-02-15 14:42:56,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:56,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112827528] [2022-02-15 14:42:56,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:56,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:56,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:56,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112827528] [2022-02-15 14:42:56,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112827528] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:56,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25703826] [2022-02-15 14:42:56,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:42:56,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:56,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:56,751 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:56,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-15 14:42:56,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:42:56,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:56,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:42:56,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:56,913 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 11 treesize of output 7 [2022-02-15 14:42:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:57,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:57,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:57,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:42:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:57,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25703826] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:57,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:57,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:42:57,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000335377] [2022-02-15 14:42:57,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:57,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:42:57,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:57,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:42:57,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:42:57,831 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:58,985 INFO L93 Difference]: Finished difference Result 785 states and 1549 transitions. [2022-02-15 14:42:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:42:58,985 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:42:58,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:58,986 INFO L225 Difference]: With dead ends: 785 [2022-02-15 14:42:58,986 INFO L226 Difference]: Without dead ends: 752 [2022-02-15 14:42:58,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=388, Invalid=3394, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:42:58,987 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 134 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:58,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 439 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1176 Invalid, 0 Unknown, 323 Unchecked, 0.5s Time] [2022-02-15 14:42:58,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-02-15 14:42:58,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 392. [2022-02-15 14:42:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2022-02-15 14:42:58,992 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2022-02-15 14:42:58,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:58,992 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2022-02-15 14:42:58,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:58,992 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2022-02-15 14:42:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:42:58,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:58,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:59,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-15 14:42:59,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:59,193 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:42:59,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:59,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1138417607, now seen corresponding path program 78 times [2022-02-15 14:42:59,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:59,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976303252] [2022-02-15 14:42:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:59,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:59,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:59,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976303252] [2022-02-15 14:42:59,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976303252] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:59,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217173867] [2022-02-15 14:42:59,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:42:59,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:59,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:59,576 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:59,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-15 14:42:59,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:42:59,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:59,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:42:59,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:59,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 14:43:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:00,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:00,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:00,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:00,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217173867] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:00,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:00,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-02-15 14:43:00,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018886735] [2022-02-15 14:43:00,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:00,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 14:43:00,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 14:43:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:43:00,722 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:02,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:02,126 INFO L93 Difference]: Finished difference Result 783 states and 1545 transitions. [2022-02-15 14:43:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:43:02,126 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:02,127 INFO L225 Difference]: With dead ends: 783 [2022-02-15 14:43:02,127 INFO L226 Difference]: Without dead ends: 747 [2022-02-15 14:43:02,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=413, Invalid=3877, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 14:43:02,128 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 133 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:02,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 580 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:43:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-02-15 14:43:02,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 388. [2022-02-15 14:43:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2022-02-15 14:43:02,133 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2022-02-15 14:43:02,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:02,133 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2022-02-15 14:43:02,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2022-02-15 14:43:02,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:02,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:02,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:02,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:02,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:02,335 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:02,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:02,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1698717151, now seen corresponding path program 79 times [2022-02-15 14:43:02,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:02,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055502251] [2022-02-15 14:43:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:02,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:02,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:02,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055502251] [2022-02-15 14:43:02,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055502251] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:02,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340759403] [2022-02-15 14:43:02,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:43:02,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:02,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:02,651 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:02,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-15 14:43:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:02,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:43:02,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:02,844 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 11 treesize of output 7 [2022-02-15 14:43:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:03,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:03,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:03,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:03,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340759403] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:03,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:03,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:43:03,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337570769] [2022-02-15 14:43:03,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:03,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:43:03,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:03,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:43:03,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:43:03,777 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:05,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:05,399 INFO L93 Difference]: Finished difference Result 800 states and 1571 transitions. [2022-02-15 14:43:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:43:05,399 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:05,401 INFO L225 Difference]: With dead ends: 800 [2022-02-15 14:43:05,401 INFO L226 Difference]: Without dead ends: 791 [2022-02-15 14:43:05,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=484, Invalid=4628, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 14:43:05,401 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 178 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:05,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 335 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:43:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-15 14:43:05,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 409. [2022-02-15 14:43:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0073529411764706) internal successors, (819), 408 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 819 transitions. [2022-02-15 14:43:05,416 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 819 transitions. Word has length 30 [2022-02-15 14:43:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:05,416 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 819 transitions. [2022-02-15 14:43:05,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 819 transitions. [2022-02-15 14:43:05,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:05,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:05,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:05,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-02-15 14:43:05,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-02-15 14:43:05,631 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:05,632 INFO L85 PathProgramCache]: Analyzing trace with hash -816651427, now seen corresponding path program 80 times [2022-02-15 14:43:05,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:05,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099324328] [2022-02-15 14:43:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:05,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:05,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:05,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099324328] [2022-02-15 14:43:05,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099324328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:05,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348932195] [2022-02-15 14:43:05,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:43:05,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:05,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:05,972 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:05,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-15 14:43:05,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:43:05,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:05,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:43:05,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:06,164 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 11 treesize of output 7 [2022-02-15 14:43:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:06,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:07,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:07,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-02-15 14:43:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:07,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348932195] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:07,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:07,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-02-15 14:43:07,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122858557] [2022-02-15 14:43:07,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:07,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 14:43:07,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:07,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 14:43:07,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:43:07,201 INFO L87 Difference]: Start difference. First operand 409 states and 819 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:09,372 INFO L93 Difference]: Finished difference Result 718 states and 1411 transitions. [2022-02-15 14:43:09,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 14:43:09,372 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:09,373 INFO L225 Difference]: With dead ends: 718 [2022-02-15 14:43:09,373 INFO L226 Difference]: Without dead ends: 703 [2022-02-15 14:43:09,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=625, Invalid=5381, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 14:43:09,374 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 191 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:09,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 450 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:43:09,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-02-15 14:43:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 407. [2022-02-15 14:43:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2022-02-15 14:43:09,379 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2022-02-15 14:43:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:09,379 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2022-02-15 14:43:09,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2022-02-15 14:43:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:09,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:09,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:09,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-15 14:43:09,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:09,580 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash 652015291, now seen corresponding path program 81 times [2022-02-15 14:43:09,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:09,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557202053] [2022-02-15 14:43:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:09,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:09,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:09,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557202053] [2022-02-15 14:43:09,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557202053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:09,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958522595] [2022-02-15 14:43:09,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:43:09,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:09,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:09,901 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:09,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-15 14:43:09,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:43:09,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:09,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:43:09,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:10,087 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 11 treesize of output 7 [2022-02-15 14:43:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:10,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:10,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:10,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:11,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958522595] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:11,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:11,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:43:11,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469593686] [2022-02-15 14:43:11,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:11,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:43:11,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:11,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:43:11,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:43:11,032 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:12,758 INFO L93 Difference]: Finished difference Result 825 states and 1617 transitions. [2022-02-15 14:43:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:43:12,759 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:12,760 INFO L225 Difference]: With dead ends: 825 [2022-02-15 14:43:12,760 INFO L226 Difference]: Without dead ends: 788 [2022-02-15 14:43:12,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=497, Invalid=4473, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 14:43:12,760 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 204 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:12,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 408 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1558 Invalid, 0 Unknown, 62 Unchecked, 0.6s Time] [2022-02-15 14:43:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-15 14:43:12,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 405. [2022-02-15 14:43:12,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2022-02-15 14:43:12,765 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2022-02-15 14:43:12,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:12,765 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2022-02-15 14:43:12,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2022-02-15 14:43:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:12,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:12,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:12,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:12,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:12,971 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:12,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1573717431, now seen corresponding path program 82 times [2022-02-15 14:43:12,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:12,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484408629] [2022-02-15 14:43:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:12,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:13,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:13,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484408629] [2022-02-15 14:43:13,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484408629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:13,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244562842] [2022-02-15 14:43:13,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:43:13,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:13,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:13,284 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:13,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-15 14:43:13,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:43:13,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:13,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:43:13,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:13,473 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 11 treesize of output 7 [2022-02-15 14:43:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:13,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:14,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:14,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:14,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244562842] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:14,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:14,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:43:14,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835771454] [2022-02-15 14:43:14,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:14,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:43:14,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:14,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:43:14,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:43:14,324 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:15,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:15,994 INFO L93 Difference]: Finished difference Result 804 states and 1585 transitions. [2022-02-15 14:43:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:43:15,994 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:15,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:15,995 INFO L225 Difference]: With dead ends: 804 [2022-02-15 14:43:15,995 INFO L226 Difference]: Without dead ends: 761 [2022-02-15 14:43:15,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=476, Invalid=4354, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 14:43:15,996 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 150 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:15,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 488 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:43:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-15 14:43:16,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 393. [2022-02-15 14:43:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2022-02-15 14:43:16,001 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2022-02-15 14:43:16,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:16,001 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2022-02-15 14:43:16,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:16,001 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2022-02-15 14:43:16,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:16,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:16,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:16,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-15 14:43:16,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:16,203 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:16,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:16,203 INFO L85 PathProgramCache]: Analyzing trace with hash 298691911, now seen corresponding path program 83 times [2022-02-15 14:43:16,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:16,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973329379] [2022-02-15 14:43:16,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:16,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:16,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:16,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973329379] [2022-02-15 14:43:16,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973329379] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:16,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872395583] [2022-02-15 14:43:16,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:43:16,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:16,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:16,525 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:16,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-15 14:43:16,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:43:16,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:16,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:43:16,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:16,715 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 11 treesize of output 7 [2022-02-15 14:43:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:17,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:17,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:17,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:17,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872395583] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:17,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:17,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:43:17,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469524582] [2022-02-15 14:43:17,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:17,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:43:17,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:17,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:43:17,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:43:17,601 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:19,813 INFO L93 Difference]: Finished difference Result 877 states and 1721 transitions. [2022-02-15 14:43:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 14:43:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:19,815 INFO L225 Difference]: With dead ends: 877 [2022-02-15 14:43:19,815 INFO L226 Difference]: Without dead ends: 868 [2022-02-15 14:43:19,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=611, Invalid=5551, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:43:19,816 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 220 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:19,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 450 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:43:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-02-15 14:43:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 407. [2022-02-15 14:43:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 406 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 817 transitions. [2022-02-15 14:43:19,821 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 817 transitions. Word has length 30 [2022-02-15 14:43:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:19,821 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 817 transitions. [2022-02-15 14:43:19,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 817 transitions. [2022-02-15 14:43:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:19,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:19,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:19,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:20,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:20,022 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:20,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1180757635, now seen corresponding path program 84 times [2022-02-15 14:43:20,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:20,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158125144] [2022-02-15 14:43:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:20,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:20,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:20,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158125144] [2022-02-15 14:43:20,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158125144] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:20,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249917074] [2022-02-15 14:43:20,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:43:20,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:20,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:20,341 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:20,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-15 14:43:20,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:43:20,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:20,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:43:20,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:20,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:43:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:20,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:21,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:21,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:21,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249917074] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:21,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:21,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:43:21,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68055746] [2022-02-15 14:43:21,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:21,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:43:21,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:43:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:43:21,496 INFO L87 Difference]: Start difference. First operand 407 states and 817 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:23,870 INFO L93 Difference]: Finished difference Result 746 states and 1474 transitions. [2022-02-15 14:43:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:43:23,870 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:23,871 INFO L225 Difference]: With dead ends: 746 [2022-02-15 14:43:23,871 INFO L226 Difference]: Without dead ends: 731 [2022-02-15 14:43:23,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=658, Invalid=5504, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 14:43:23,872 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:23,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 378 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:43:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-02-15 14:43:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 405. [2022-02-15 14:43:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.012376237623762) internal successors, (813), 404 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 813 transitions. [2022-02-15 14:43:23,876 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 813 transitions. Word has length 30 [2022-02-15 14:43:23,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:23,877 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 813 transitions. [2022-02-15 14:43:23,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 813 transitions. [2022-02-15 14:43:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:23,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:23,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:23,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:24,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-02-15 14:43:24,078 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1645542943, now seen corresponding path program 85 times [2022-02-15 14:43:24,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:24,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340951250] [2022-02-15 14:43:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:24,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:24,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:24,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340951250] [2022-02-15 14:43:24,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340951250] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:24,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428917122] [2022-02-15 14:43:24,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:43:24,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:24,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:24,402 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:24,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-15 14:43:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:24,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:43:24,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:24,594 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 11 treesize of output 7 [2022-02-15 14:43:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:25,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:25,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:25,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:25,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428917122] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:25,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:25,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:43:25,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855813726] [2022-02-15 14:43:25,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:25,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:43:25,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:25,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:43:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:43:25,556 INFO L87 Difference]: Start difference. First operand 405 states and 813 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:27,681 INFO L93 Difference]: Finished difference Result 893 states and 1754 transitions. [2022-02-15 14:43:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 14:43:27,682 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:27,683 INFO L225 Difference]: With dead ends: 893 [2022-02-15 14:43:27,683 INFO L226 Difference]: Without dead ends: 832 [2022-02-15 14:43:27,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=632, Invalid=5374, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 14:43:27,683 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 229 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:27,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 426 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1746 Invalid, 0 Unknown, 139 Unchecked, 0.7s Time] [2022-02-15 14:43:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-02-15 14:43:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 404. [2022-02-15 14:43:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9975186104218363) internal successors, (805), 403 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 805 transitions. [2022-02-15 14:43:27,689 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 805 transitions. Word has length 30 [2022-02-15 14:43:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:27,689 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 805 transitions. [2022-02-15 14:43:27,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 805 transitions. [2022-02-15 14:43:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:27,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:27,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:27,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:27,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-02-15 14:43:27,904 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash -756924553, now seen corresponding path program 86 times [2022-02-15 14:43:27,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:27,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642951448] [2022-02-15 14:43:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:27,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:28,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:28,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642951448] [2022-02-15 14:43:28,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642951448] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:28,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670432037] [2022-02-15 14:43:28,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:43:28,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:28,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:28,236 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:28,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-15 14:43:28,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:43:28,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:28,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:43:28,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:28,431 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 11 treesize of output 7 [2022-02-15 14:43:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:28,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:29,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:29,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:29,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670432037] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:29,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:29,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:43:29,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843176952] [2022-02-15 14:43:29,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:29,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:43:29,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:43:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:43:29,392 INFO L87 Difference]: Start difference. First operand 404 states and 805 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:30,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:30,743 INFO L93 Difference]: Finished difference Result 778 states and 1525 transitions. [2022-02-15 14:43:30,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:43:30,744 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:30,745 INFO L225 Difference]: With dead ends: 778 [2022-02-15 14:43:30,745 INFO L226 Difference]: Without dead ends: 769 [2022-02-15 14:43:30,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=385, Invalid=3647, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 14:43:30,745 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 138 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:30,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 411 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:43:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-02-15 14:43:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 406. [2022-02-15 14:43:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9950617283950618) internal successors, (808), 405 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 808 transitions. [2022-02-15 14:43:30,750 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 808 transitions. Word has length 30 [2022-02-15 14:43:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:30,751 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 808 transitions. [2022-02-15 14:43:30,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 808 transitions. [2022-02-15 14:43:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:30,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:30,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:30,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:30,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:30,953 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:30,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:30,954 INFO L85 PathProgramCache]: Analyzing trace with hash 125141171, now seen corresponding path program 87 times [2022-02-15 14:43:30,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:30,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476762901] [2022-02-15 14:43:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:30,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:31,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:31,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476762901] [2022-02-15 14:43:31,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476762901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:31,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267901742] [2022-02-15 14:43:31,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:43:31,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:31,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:31,288 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:31,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-15 14:43:31,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:43:31,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:31,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:43:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:31,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:43:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:31,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:32,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:32,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:32,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267901742] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:32,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:32,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:43:32,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522478618] [2022-02-15 14:43:32,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:32,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:43:32,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:32,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:43:32,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:43:32,483 INFO L87 Difference]: Start difference. First operand 406 states and 808 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:34,052 INFO L93 Difference]: Finished difference Result 666 states and 1317 transitions. [2022-02-15 14:43:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:43:34,052 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:34,053 INFO L225 Difference]: With dead ends: 666 [2022-02-15 14:43:34,053 INFO L226 Difference]: Without dead ends: 643 [2022-02-15 14:43:34,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=409, Invalid=3623, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 14:43:34,054 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 140 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:34,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 422 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:43:34,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-02-15 14:43:34,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 396. [2022-02-15 14:43:34,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2022-02-15 14:43:34,059 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2022-02-15 14:43:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:34,059 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2022-02-15 14:43:34,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2022-02-15 14:43:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:34,059 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:34,059 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:34,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:34,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:34,260 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash -752866479, now seen corresponding path program 88 times [2022-02-15 14:43:34,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:34,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030667602] [2022-02-15 14:43:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:34,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:34,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:34,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030667602] [2022-02-15 14:43:34,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030667602] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:34,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794158688] [2022-02-15 14:43:34,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:43:34,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:34,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:34,573 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:34,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-15 14:43:34,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:43:34,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:34,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:43:34,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:34,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 14:43:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:35,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:35,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:35,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:35,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794158688] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:35,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:35,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:43:35,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601305575] [2022-02-15 14:43:35,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:35,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:43:35,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:35,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:43:35,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:43:35,660 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:36,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:36,886 INFO L93 Difference]: Finished difference Result 790 states and 1555 transitions. [2022-02-15 14:43:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:43:36,886 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:36,887 INFO L225 Difference]: With dead ends: 790 [2022-02-15 14:43:36,887 INFO L226 Difference]: Without dead ends: 753 [2022-02-15 14:43:36,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=389, Invalid=3517, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 14:43:36,888 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 128 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:36,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 383 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1246 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2022-02-15 14:43:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-02-15 14:43:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 392. [2022-02-15 14:43:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2022-02-15 14:43:36,893 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 30 [2022-02-15 14:43:36,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:36,893 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2022-02-15 14:43:36,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:36,893 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2022-02-15 14:43:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:36,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:36,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:36,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:37,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-02-15 14:43:37,094 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:37,095 INFO L85 PathProgramCache]: Analyzing trace with hash -922111945, now seen corresponding path program 89 times [2022-02-15 14:43:37,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:37,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590172060] [2022-02-15 14:43:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:37,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:37,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:37,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590172060] [2022-02-15 14:43:37,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590172060] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:37,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499900228] [2022-02-15 14:43:37,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:43:37,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:37,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:37,413 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:37,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-15 14:43:37,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:43:37,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:37,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:43:37,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:37,601 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 11 treesize of output 7 [2022-02-15 14:43:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:37,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:38,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:38,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:38,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499900228] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:38,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:38,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:43:38,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109863330] [2022-02-15 14:43:38,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:38,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:43:38,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:38,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:43:38,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:43:38,467 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:40,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:40,739 INFO L93 Difference]: Finished difference Result 867 states and 1705 transitions. [2022-02-15 14:43:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 14:43:40,739 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:40,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:40,740 INFO L225 Difference]: With dead ends: 867 [2022-02-15 14:43:40,740 INFO L226 Difference]: Without dead ends: 858 [2022-02-15 14:43:40,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=692, Invalid=5788, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 14:43:40,740 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:40,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 390 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:43:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-02-15 14:43:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 407. [2022-02-15 14:43:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2022-02-15 14:43:40,746 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2022-02-15 14:43:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:40,746 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2022-02-15 14:43:40,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2022-02-15 14:43:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:40,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:40,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:40,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-02-15 14:43:40,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:40,947 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:40,948 INFO L85 PathProgramCache]: Analyzing trace with hash -40046221, now seen corresponding path program 90 times [2022-02-15 14:43:40,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:40,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061712884] [2022-02-15 14:43:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:40,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:41,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:41,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061712884] [2022-02-15 14:43:41,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061712884] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:41,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034559639] [2022-02-15 14:43:41,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:43:41,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:41,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:41,261 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:41,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-15 14:43:41,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:43:41,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:41,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:43:41,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:41,458 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 11 treesize of output 7 [2022-02-15 14:43:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:41,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:42,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:42,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:42,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034559639] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:42,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:42,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:43:42,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603823121] [2022-02-15 14:43:42,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:42,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:43:42,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:42,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:43:42,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:43:42,371 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:44,791 INFO L93 Difference]: Finished difference Result 724 states and 1435 transitions. [2022-02-15 14:43:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 14:43:44,791 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:44,792 INFO L225 Difference]: With dead ends: 724 [2022-02-15 14:43:44,792 INFO L226 Difference]: Without dead ends: 709 [2022-02-15 14:43:44,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=706, Invalid=5614, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 14:43:44,792 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 246 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:44,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 346 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:43:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-02-15 14:43:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 405. [2022-02-15 14:43:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.014851485148515) internal successors, (814), 404 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 814 transitions. [2022-02-15 14:43:44,797 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 814 transitions. Word has length 30 [2022-02-15 14:43:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:44,797 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 814 transitions. [2022-02-15 14:43:44,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 814 transitions. [2022-02-15 14:43:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:44,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:44,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:44,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:44,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-15 14:43:44,998 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:44,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:44,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1428620497, now seen corresponding path program 91 times [2022-02-15 14:43:44,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:44,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033534032] [2022-02-15 14:43:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:44,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:45,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:45,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033534032] [2022-02-15 14:43:45,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033534032] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:45,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130128354] [2022-02-15 14:43:45,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:43:45,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:45,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:45,307 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:45,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-15 14:43:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:45,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:43:45,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:45,487 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 11 treesize of output 7 [2022-02-15 14:43:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:45,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:46,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:46,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:46,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130128354] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:46,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:46,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:43:46,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56341706] [2022-02-15 14:43:46,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:46,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:43:46,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:46,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:43:46,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:43:46,298 INFO L87 Difference]: Start difference. First operand 405 states and 814 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:48,869 INFO L93 Difference]: Finished difference Result 922 states and 1803 transitions. [2022-02-15 14:43:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 14:43:48,869 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:48,870 INFO L225 Difference]: With dead ends: 922 [2022-02-15 14:43:48,870 INFO L226 Difference]: Without dead ends: 861 [2022-02-15 14:43:48,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=768, Invalid=6372, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 14:43:48,870 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 228 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:48,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 533 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2312 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:43:48,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-02-15 14:43:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 404. [2022-02-15 14:43:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0) internal successors, (806), 403 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 806 transitions. [2022-02-15 14:43:48,876 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 806 transitions. Word has length 30 [2022-02-15 14:43:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:48,877 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 806 transitions. [2022-02-15 14:43:48,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 806 transitions. [2022-02-15 14:43:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:48,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:48,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:48,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:49,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-15 14:43:49,078 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:49,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1977728409, now seen corresponding path program 92 times [2022-02-15 14:43:49,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:49,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815147149] [2022-02-15 14:43:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:49,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:49,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:49,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815147149] [2022-02-15 14:43:49,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815147149] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:49,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795724283] [2022-02-15 14:43:49,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:43:49,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:49,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:49,393 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:49,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-15 14:43:49,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:43:49,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:49,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:43:49,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:49,579 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 11 treesize of output 7 [2022-02-15 14:43:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:49,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:50,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:50,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:50,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795724283] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:50,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:50,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:43:50,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620164112] [2022-02-15 14:43:50,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:50,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:43:50,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:43:50,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:43:50,449 INFO L87 Difference]: Start difference. First operand 404 states and 806 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:52,057 INFO L93 Difference]: Finished difference Result 786 states and 1543 transitions. [2022-02-15 14:43:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 14:43:52,057 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:52,059 INFO L225 Difference]: With dead ends: 786 [2022-02-15 14:43:52,059 INFO L226 Difference]: Without dead ends: 777 [2022-02-15 14:43:52,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=472, Invalid=4220, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:43:52,059 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:52,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 399 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:43:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-02-15 14:43:52,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 406. [2022-02-15 14:43:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.997530864197531) internal successors, (809), 405 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 809 transitions. [2022-02-15 14:43:52,065 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 809 transitions. Word has length 30 [2022-02-15 14:43:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:52,065 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 809 transitions. [2022-02-15 14:43:52,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 809 transitions. [2022-02-15 14:43:52,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:52,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:52,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:52,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-15 14:43:52,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-02-15 14:43:52,266 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1095662685, now seen corresponding path program 93 times [2022-02-15 14:43:52,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:52,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248906401] [2022-02-15 14:43:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:52,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:52,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:52,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248906401] [2022-02-15 14:43:52,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248906401] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:52,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009271917] [2022-02-15 14:43:52,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:43:52,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:52,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:52,586 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:52,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-15 14:43:52,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:43:52,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:52,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:43:52,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:52,779 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 11 treesize of output 7 [2022-02-15 14:43:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:53,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:53,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:53,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:53,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009271917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:53,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:53,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:43:53,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578729937] [2022-02-15 14:43:53,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:53,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:43:53,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:53,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:43:53,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:43:53,662 INFO L87 Difference]: Start difference. First operand 406 states and 809 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:55,496 INFO L93 Difference]: Finished difference Result 659 states and 1306 transitions. [2022-02-15 14:43:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:43:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:55,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:55,498 INFO L225 Difference]: With dead ends: 659 [2022-02-15 14:43:55,498 INFO L226 Difference]: Without dead ends: 636 [2022-02-15 14:43:55,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=504, Invalid=4188, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:43:55,498 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 169 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:55,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 396 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:43:55,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-02-15 14:43:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 396. [2022-02-15 14:43:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.010126582278481) internal successors, (794), 395 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 794 transitions. [2022-02-15 14:43:55,503 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 794 transitions. Word has length 30 [2022-02-15 14:43:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:55,503 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 794 transitions. [2022-02-15 14:43:55,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 794 transitions. [2022-02-15 14:43:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:55,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:55,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:55,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-02-15 14:43:55,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:55,705 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:55,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1973670335, now seen corresponding path program 94 times [2022-02-15 14:43:55,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:55,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525420142] [2022-02-15 14:43:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:55,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:56,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:56,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525420142] [2022-02-15 14:43:56,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525420142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:56,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759534256] [2022-02-15 14:43:56,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:43:56,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:56,019 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:56,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-15 14:43:56,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:43:56,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:56,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:43:56,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:56,208 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 11 treesize of output 7 [2022-02-15 14:43:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:56,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:56,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:56,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:43:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:57,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759534256] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:57,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:57,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:43:57,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064569153] [2022-02-15 14:43:57,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:57,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:43:57,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:57,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:43:57,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:43:57,066 INFO L87 Difference]: Start difference. First operand 396 states and 794 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:58,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:58,727 INFO L93 Difference]: Finished difference Result 799 states and 1579 transitions. [2022-02-15 14:43:58,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:43:58,727 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:43:58,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:58,728 INFO L225 Difference]: With dead ends: 799 [2022-02-15 14:43:58,728 INFO L226 Difference]: Without dead ends: 766 [2022-02-15 14:43:58,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=475, Invalid=4081, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:43:58,729 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 156 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:58,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 464 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:43:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-02-15 14:43:58,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 393. [2022-02-15 14:43:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.0127551020408165) internal successors, (789), 392 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:58,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 789 transitions. [2022-02-15 14:43:58,734 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 789 transitions. Word has length 30 [2022-02-15 14:43:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:58,734 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 789 transitions. [2022-02-15 14:43:58,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 789 transitions. [2022-02-15 14:43:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:43:58,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:58,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:58,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-02-15 14:43:58,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:58,935 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:43:58,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1487532831, now seen corresponding path program 95 times [2022-02-15 14:43:58,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:58,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200050091] [2022-02-15 14:43:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:58,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:59,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:59,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200050091] [2022-02-15 14:43:59,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200050091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:59,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130907515] [2022-02-15 14:43:59,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:43:59,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:59,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:59,252 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:59,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-15 14:43:59,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:43:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:43:59,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:43:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:59,447 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 11 treesize of output 7 [2022-02-15 14:43:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:59,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:00,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:00,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:00,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130907515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:00,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:00,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:44:00,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614431622] [2022-02-15 14:44:00,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:00,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:44:00,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:00,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:44:00,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:44:00,317 INFO L87 Difference]: Start difference. First operand 393 states and 789 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:01,745 INFO L93 Difference]: Finished difference Result 792 states and 1553 transitions. [2022-02-15 14:44:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:44:01,746 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:01,747 INFO L225 Difference]: With dead ends: 792 [2022-02-15 14:44:01,747 INFO L226 Difference]: Without dead ends: 783 [2022-02-15 14:44:01,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=392, Invalid=3768, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:44:01,747 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 133 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:01,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 483 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:44:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-02-15 14:44:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 407. [2022-02-15 14:44:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2022-02-15 14:44:01,753 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2022-02-15 14:44:01,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:01,753 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2022-02-15 14:44:01,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2022-02-15 14:44:01,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:01,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:01,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:01,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-02-15 14:44:01,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-15 14:44:01,955 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:01,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:01,955 INFO L85 PathProgramCache]: Analyzing trace with hash -605467107, now seen corresponding path program 96 times [2022-02-15 14:44:01,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:01,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826377687] [2022-02-15 14:44:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:01,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:02,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:02,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826377687] [2022-02-15 14:44:02,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826377687] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:02,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627969063] [2022-02-15 14:44:02,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:44:02,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:02,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:02,279 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:02,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-15 14:44:02,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:44:02,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:02,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:02,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:02,478 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 11 treesize of output 7 [2022-02-15 14:44:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:02,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:03,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:03,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:03,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627969063] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:03,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:03,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:44:03,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420290093] [2022-02-15 14:44:03,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:03,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:44:03,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:03,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:44:03,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:44:03,377 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:04,890 INFO L93 Difference]: Finished difference Result 682 states and 1351 transitions. [2022-02-15 14:44:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:44:04,891 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:04,892 INFO L225 Difference]: With dead ends: 682 [2022-02-15 14:44:04,892 INFO L226 Difference]: Without dead ends: 667 [2022-02-15 14:44:04,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=418, Invalid=3742, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:44:04,892 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 170 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:04,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 391 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:44:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-02-15 14:44:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 405. [2022-02-15 14:44:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2022-02-15 14:44:04,896 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2022-02-15 14:44:04,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:04,897 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2022-02-15 14:44:04,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2022-02-15 14:44:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:04,897 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:04,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:04,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-02-15 14:44:05,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:05,098 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:05,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:05,098 INFO L85 PathProgramCache]: Analyzing trace with hash 863199611, now seen corresponding path program 97 times [2022-02-15 14:44:05,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:05,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396717495] [2022-02-15 14:44:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:05,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:05,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:05,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396717495] [2022-02-15 14:44:05,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396717495] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:05,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575305742] [2022-02-15 14:44:05,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:44:05,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:05,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:05,440 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:05,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-15 14:44:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:05,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:05,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:05,622 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 11 treesize of output 7 [2022-02-15 14:44:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:05,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:06,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:06,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:06,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575305742] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:06,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:06,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:44:06,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212456057] [2022-02-15 14:44:06,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:06,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:44:06,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:06,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:44:06,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:44:06,512 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:07,836 INFO L93 Difference]: Finished difference Result 807 states and 1590 transitions. [2022-02-15 14:44:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:44:07,837 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:07,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:07,838 INFO L225 Difference]: With dead ends: 807 [2022-02-15 14:44:07,838 INFO L226 Difference]: Without dead ends: 762 [2022-02-15 14:44:07,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=382, Invalid=3278, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 14:44:07,838 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 119 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:07,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 546 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1782 Invalid, 0 Unknown, 43 Unchecked, 0.7s Time] [2022-02-15 14:44:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-02-15 14:44:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 397. [2022-02-15 14:44:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2022-02-15 14:44:07,843 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2022-02-15 14:44:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:07,843 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2022-02-15 14:44:07,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2022-02-15 14:44:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:07,844 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:07,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:07,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:08,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:08,044 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1483474757, now seen corresponding path program 98 times [2022-02-15 14:44:08,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:08,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343044346] [2022-02-15 14:44:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:08,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:08,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:08,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343044346] [2022-02-15 14:44:08,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343044346] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:08,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304436307] [2022-02-15 14:44:08,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:44:08,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:08,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:08,354 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:08,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-15 14:44:08,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:44:08,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:08,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:08,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:08,545 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 11 treesize of output 7 [2022-02-15 14:44:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:08,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:09,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:09,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:09,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304436307] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:09,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:09,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:44:09,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547258358] [2022-02-15 14:44:09,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:09,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:44:09,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:09,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:44:09,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:44:09,388 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:10,484 INFO L93 Difference]: Finished difference Result 790 states and 1559 transitions. [2022-02-15 14:44:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:44:10,484 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:10,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:10,485 INFO L225 Difference]: With dead ends: 790 [2022-02-15 14:44:10,485 INFO L226 Difference]: Without dead ends: 757 [2022-02-15 14:44:10,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=373, Invalid=3409, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:44:10,486 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:10,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 337 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:44:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-02-15 14:44:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 395. [2022-02-15 14:44:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2022-02-15 14:44:10,490 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2022-02-15 14:44:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:10,491 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2022-02-15 14:44:10,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2022-02-15 14:44:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:10,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:10,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:10,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-02-15 14:44:10,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:10,695 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:10,696 INFO L85 PathProgramCache]: Analyzing trace with hash 471983799, now seen corresponding path program 99 times [2022-02-15 14:44:10,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:10,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817294988] [2022-02-15 14:44:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:10,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:11,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:11,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817294988] [2022-02-15 14:44:11,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817294988] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:11,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823116462] [2022-02-15 14:44:11,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:44:11,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:11,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:11,021 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:11,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-15 14:44:11,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:44:11,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:11,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:11,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:11,222 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 15 treesize of output 7 [2022-02-15 14:44:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:11,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:12,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:12,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:12,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823116462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:12,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:12,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-02-15 14:44:12,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137281018] [2022-02-15 14:44:12,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:12,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 14:44:12,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 14:44:12,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:44:12,158 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:13,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:13,423 INFO L93 Difference]: Finished difference Result 788 states and 1555 transitions. [2022-02-15 14:44:13,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:44:13,424 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:13,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:13,425 INFO L225 Difference]: With dead ends: 788 [2022-02-15 14:44:13,425 INFO L226 Difference]: Without dead ends: 752 [2022-02-15 14:44:13,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=398, Invalid=3892, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 14:44:13,425 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:13,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 422 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:44:13,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-02-15 14:44:13,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 391. [2022-02-15 14:44:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.01025641025641) internal successors, (784), 390 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 784 transitions. [2022-02-15 14:44:13,430 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 784 transitions. Word has length 30 [2022-02-15 14:44:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:13,430 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 784 transitions. [2022-02-15 14:44:13,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:13,430 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 784 transitions. [2022-02-15 14:44:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:13,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:13,431 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:13,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-02-15 14:44:13,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-15 14:44:13,631 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:13,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:13,632 INFO L85 PathProgramCache]: Analyzing trace with hash 758969475, now seen corresponding path program 100 times [2022-02-15 14:44:13,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:13,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91678808] [2022-02-15 14:44:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:13,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:14,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:14,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91678808] [2022-02-15 14:44:14,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91678808] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:14,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483955709] [2022-02-15 14:44:14,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:44:14,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:14,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:14,009 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:14,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-15 14:44:14,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:44:14,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:14,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:14,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:14,236 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 11 treesize of output 7 [2022-02-15 14:44:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:14,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:14,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:14,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:15,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483955709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:15,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:15,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:44:15,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941504314] [2022-02-15 14:44:15,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:15,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:44:15,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:15,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:44:15,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:44:15,081 INFO L87 Difference]: Start difference. First operand 391 states and 784 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:17,853 INFO L93 Difference]: Finished difference Result 989 states and 1946 transitions. [2022-02-15 14:44:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 14:44:17,853 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:17,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:17,854 INFO L225 Difference]: With dead ends: 989 [2022-02-15 14:44:17,854 INFO L226 Difference]: Without dead ends: 980 [2022-02-15 14:44:17,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2274 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=801, Invalid=6681, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 14:44:17,855 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 285 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:17,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 494 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 14:44:17,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-02-15 14:44:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 409. [2022-02-15 14:44:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0220588235294117) internal successors, (825), 408 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 825 transitions. [2022-02-15 14:44:17,861 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 825 transitions. Word has length 30 [2022-02-15 14:44:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:17,861 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 825 transitions. [2022-02-15 14:44:17,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 825 transitions. [2022-02-15 14:44:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:17,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:17,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:17,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-15 14:44:18,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-15 14:44:18,062 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1641035199, now seen corresponding path program 101 times [2022-02-15 14:44:18,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:18,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953199449] [2022-02-15 14:44:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:18,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:18,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:18,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953199449] [2022-02-15 14:44:18,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953199449] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:18,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517496007] [2022-02-15 14:44:18,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:44:18,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:18,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:18,375 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:18,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-15 14:44:18,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:44:18,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:18,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:44:18,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:18,602 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 11 treesize of output 7 [2022-02-15 14:44:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:18,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:19,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:19,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:19,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517496007] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:19,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:19,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:44:19,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011641640] [2022-02-15 14:44:19,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:19,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:44:19,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:19,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:44:19,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:44:19,551 INFO L87 Difference]: Start difference. First operand 409 states and 825 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:22,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:22,592 INFO L93 Difference]: Finished difference Result 824 states and 1632 transitions. [2022-02-15 14:44:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 14:44:22,592 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:22,593 INFO L225 Difference]: With dead ends: 824 [2022-02-15 14:44:22,593 INFO L226 Difference]: Without dead ends: 809 [2022-02-15 14:44:22,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2243 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=819, Invalid=6491, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 14:44:22,593 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 255 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 2640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:22,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 473 Invalid, 2640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 14:44:22,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-02-15 14:44:22,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 407. [2022-02-15 14:44:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.022167487684729) internal successors, (821), 406 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 821 transitions. [2022-02-15 14:44:22,598 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 821 transitions. Word has length 30 [2022-02-15 14:44:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:22,598 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 821 transitions. [2022-02-15 14:44:22,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 821 transitions. [2022-02-15 14:44:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:22,599 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:22,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:22,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-15 14:44:22,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-15 14:44:22,800 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:22,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1185265379, now seen corresponding path program 102 times [2022-02-15 14:44:22,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:22,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078544346] [2022-02-15 14:44:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:22,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:23,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:23,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078544346] [2022-02-15 14:44:23,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078544346] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:23,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442888997] [2022-02-15 14:44:23,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:44:23,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:23,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:23,114 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:23,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-15 14:44:23,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:44:23,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:44:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:23,327 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 11 treesize of output 7 [2022-02-15 14:44:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:23,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:24,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:24,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:24,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442888997] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:24,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:24,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:44:24,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124276515] [2022-02-15 14:44:24,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:24,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:44:24,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:24,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:44:24,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:44:24,221 INFO L87 Difference]: Start difference. First operand 407 states and 821 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:27,142 INFO L93 Difference]: Finished difference Result 1053 states and 2058 transitions. [2022-02-15 14:44:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 14:44:27,143 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:27,144 INFO L225 Difference]: With dead ends: 1053 [2022-02-15 14:44:27,144 INFO L226 Difference]: Without dead ends: 992 [2022-02-15 14:44:27,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=877, Invalid=7313, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 14:44:27,145 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 348 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2227 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:27,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 506 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2227 Invalid, 0 Unknown, 84 Unchecked, 0.9s Time] [2022-02-15 14:44:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-02-15 14:44:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 406. [2022-02-15 14:44:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2022-02-15 14:44:27,150 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2022-02-15 14:44:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:27,151 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2022-02-15 14:44:27,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2022-02-15 14:44:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:27,151 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:27,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:27,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:27,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-02-15 14:44:27,352 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:27,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:27,352 INFO L85 PathProgramCache]: Analyzing trace with hash -296646989, now seen corresponding path program 103 times [2022-02-15 14:44:27,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:27,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624020152] [2022-02-15 14:44:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:27,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:27,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:27,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624020152] [2022-02-15 14:44:27,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624020152] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:27,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383684192] [2022-02-15 14:44:27,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:44:27,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:27,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:27,666 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:27,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-15 14:44:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:27,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:27,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:27,883 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 11 treesize of output 7 [2022-02-15 14:44:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:28,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:28,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:28,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:28,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383684192] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:28,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:28,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:44:28,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677903574] [2022-02-15 14:44:28,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:28,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:44:28,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:28,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:44:28,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:44:28,804 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:30,741 INFO L93 Difference]: Finished difference Result 839 states and 1652 transitions. [2022-02-15 14:44:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 14:44:30,741 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:30,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:30,742 INFO L225 Difference]: With dead ends: 839 [2022-02-15 14:44:30,742 INFO L226 Difference]: Without dead ends: 830 [2022-02-15 14:44:30,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=535, Invalid=4867, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 14:44:30,743 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1902 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:30,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 402 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1902 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:44:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-02-15 14:44:30,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 408. [2022-02-15 14:44:30,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.004914004914005) internal successors, (816), 407 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:30,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 816 transitions. [2022-02-15 14:44:30,748 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 816 transitions. Word has length 30 [2022-02-15 14:44:30,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:30,748 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 816 transitions. [2022-02-15 14:44:30,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 816 transitions. [2022-02-15 14:44:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:30,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:30,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:30,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:30,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:30,949 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:30,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:30,949 INFO L85 PathProgramCache]: Analyzing trace with hash 585418735, now seen corresponding path program 104 times [2022-02-15 14:44:30,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:30,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568154621] [2022-02-15 14:44:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:30,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:31,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:31,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568154621] [2022-02-15 14:44:31,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568154621] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:31,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786503900] [2022-02-15 14:44:31,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:44:31,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:31,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:31,291 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:31,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-15 14:44:31,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:44:31,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:31,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:31,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:31,516 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 11 treesize of output 7 [2022-02-15 14:44:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:31,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:32,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:32,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:32,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786503900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:32,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:32,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:44:32,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577472118] [2022-02-15 14:44:32,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:32,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:44:32,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:32,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:44:32,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:44:32,397 INFO L87 Difference]: Start difference. First operand 408 states and 816 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:34,447 INFO L93 Difference]: Finished difference Result 706 states and 1396 transitions. [2022-02-15 14:44:34,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 14:44:34,447 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:34,448 INFO L225 Difference]: With dead ends: 706 [2022-02-15 14:44:34,448 INFO L226 Difference]: Without dead ends: 673 [2022-02-15 14:44:34,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=589, Invalid=5111, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 14:44:34,449 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 241 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:34,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 304 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1490 Invalid, 0 Unknown, 149 Unchecked, 0.6s Time] [2022-02-15 14:44:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-02-15 14:44:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 398. [2022-02-15 14:44:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.017632241813602) internal successors, (801), 397 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 801 transitions. [2022-02-15 14:44:34,453 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 801 transitions. Word has length 30 [2022-02-15 14:44:34,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:34,453 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 801 transitions. [2022-02-15 14:44:34,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 801 transitions. [2022-02-15 14:44:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:34,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:34,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:34,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:34,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:34,655 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash -292588915, now seen corresponding path program 105 times [2022-02-15 14:44:34,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:34,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510382182] [2022-02-15 14:44:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:34,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:34,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:34,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510382182] [2022-02-15 14:44:34,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510382182] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:34,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622957639] [2022-02-15 14:44:34,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:44:34,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:34,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:34,976 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:34,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-15 14:44:34,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:44:34,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:34,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:34,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:35,199 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 15 treesize of output 7 [2022-02-15 14:44:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:35,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:35,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:35,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:36,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622957639] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:36,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:36,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:44:36,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128368429] [2022-02-15 14:44:36,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:36,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:44:36,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:36,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:44:36,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:44:36,076 INFO L87 Difference]: Start difference. First operand 398 states and 801 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:38,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:38,255 INFO L93 Difference]: Finished difference Result 852 states and 1688 transitions. [2022-02-15 14:44:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:44:38,255 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:38,256 INFO L225 Difference]: With dead ends: 852 [2022-02-15 14:44:38,256 INFO L226 Difference]: Without dead ends: 819 [2022-02-15 14:44:38,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=536, Invalid=4720, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 14:44:38,256 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 178 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:38,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 579 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 14:44:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-02-15 14:44:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 395. [2022-02-15 14:44:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.020304568527919) internal successors, (796), 394 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:38,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 796 transitions. [2022-02-15 14:44:38,262 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 796 transitions. Word has length 30 [2022-02-15 14:44:38,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:38,262 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 796 transitions. [2022-02-15 14:44:38,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:38,262 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 796 transitions. [2022-02-15 14:44:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:38,262 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:38,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:38,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:38,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-02-15 14:44:38,463 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:38,463 INFO L85 PathProgramCache]: Analyzing trace with hash 193548589, now seen corresponding path program 106 times [2022-02-15 14:44:38,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:38,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543750107] [2022-02-15 14:44:38,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:38,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:38,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:38,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543750107] [2022-02-15 14:44:38,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543750107] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:38,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894625184] [2022-02-15 14:44:38,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:44:38,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:38,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:38,777 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:38,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-15 14:44:38,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:44:38,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:38,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:38,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:38,999 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 11 treesize of output 7 [2022-02-15 14:44:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:39,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:39,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:39,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:39,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894625184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:39,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:39,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:44:39,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009539347] [2022-02-15 14:44:39,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:39,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:44:39,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:39,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:44:39,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:44:39,842 INFO L87 Difference]: Start difference. First operand 395 states and 796 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:41,797 INFO L93 Difference]: Finished difference Result 836 states and 1644 transitions. [2022-02-15 14:44:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:44:41,797 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:41,798 INFO L225 Difference]: With dead ends: 836 [2022-02-15 14:44:41,798 INFO L226 Difference]: Without dead ends: 827 [2022-02-15 14:44:41,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=463, Invalid=4649, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 14:44:41,798 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 161 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:41,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 547 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:44:41,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-02-15 14:44:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 409. [2022-02-15 14:44:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.014705882352941) internal successors, (822), 408 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 822 transitions. [2022-02-15 14:44:41,804 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 822 transitions. Word has length 30 [2022-02-15 14:44:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:41,804 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 822 transitions. [2022-02-15 14:44:41,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 822 transitions. [2022-02-15 14:44:41,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:41,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:41,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:41,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-02-15 14:44:42,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:42,005 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1075614313, now seen corresponding path program 107 times [2022-02-15 14:44:42,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:42,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599550381] [2022-02-15 14:44:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:42,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:42,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:42,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599550381] [2022-02-15 14:44:42,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599550381] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:42,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572250238] [2022-02-15 14:44:42,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:44:42,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:42,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:42,324 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:42,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-15 14:44:42,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:44:42,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:42,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:42,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:42,543 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 11 treesize of output 7 [2022-02-15 14:44:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:42,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:43,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:43,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:43,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572250238] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:43,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:43,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:44:43,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69721214] [2022-02-15 14:44:43,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:43,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:44:43,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:43,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:44:43,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:44:43,487 INFO L87 Difference]: Start difference. First operand 409 states and 822 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:45,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:45,454 INFO L93 Difference]: Finished difference Result 717 states and 1424 transitions. [2022-02-15 14:44:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:44:45,454 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:45,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:45,455 INFO L225 Difference]: With dead ends: 717 [2022-02-15 14:44:45,455 INFO L226 Difference]: Without dead ends: 702 [2022-02-15 14:44:45,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=497, Invalid=4615, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 14:44:45,456 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 185 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:45,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 366 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:44:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-02-15 14:44:45,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 407. [2022-02-15 14:44:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2022-02-15 14:44:45,461 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2022-02-15 14:44:45,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:45,461 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2022-02-15 14:44:45,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2022-02-15 14:44:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:45,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:45,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:45,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:45,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:45,663 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1750686265, now seen corresponding path program 108 times [2022-02-15 14:44:45,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:45,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669049384] [2022-02-15 14:44:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:45,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:45,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:45,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669049384] [2022-02-15 14:44:45,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669049384] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:45,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266972590] [2022-02-15 14:44:45,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:44:45,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:45,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:45,972 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:45,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-15 14:44:45,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:44:45,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:45,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:46,185 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 11 treesize of output 7 [2022-02-15 14:44:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:46,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:46,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:46,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:46,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266972590] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:46,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:46,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:44:46,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202045893] [2022-02-15 14:44:46,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:46,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:44:46,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:46,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:44:46,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:44:46,946 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:48,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:48,606 INFO L93 Difference]: Finished difference Result 851 states and 1681 transitions. [2022-02-15 14:44:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:44:48,607 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:48,608 INFO L225 Difference]: With dead ends: 851 [2022-02-15 14:44:48,608 INFO L226 Difference]: Without dead ends: 806 [2022-02-15 14:44:48,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=453, Invalid=4103, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:44:48,608 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 174 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1916 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:48,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 469 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1916 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:44:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-02-15 14:44:48,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 399. [2022-02-15 14:44:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0150753768844223) internal successors, (802), 398 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 802 transitions. [2022-02-15 14:44:48,614 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 802 transitions. Word has length 30 [2022-02-15 14:44:48,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:48,614 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 802 transitions. [2022-02-15 14:44:48,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:48,615 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 802 transitions. [2022-02-15 14:44:48,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:48,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:48,615 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:48,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-02-15 14:44:48,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:48,816 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:48,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:48,817 INFO L85 PathProgramCache]: Analyzing trace with hash 197606663, now seen corresponding path program 109 times [2022-02-15 14:44:48,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:48,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299879709] [2022-02-15 14:44:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:48,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:49,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:49,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299879709] [2022-02-15 14:44:49,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299879709] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:49,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617368540] [2022-02-15 14:44:49,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:44:49,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:49,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:49,131 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:49,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-15 14:44:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:49,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:49,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:49,357 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 11 treesize of output 7 [2022-02-15 14:44:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:49,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:50,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:50,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:50,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617368540] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:50,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:50,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:44:50,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123874562] [2022-02-15 14:44:50,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:50,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:44:50,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:50,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:44:50,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:44:50,195 INFO L87 Difference]: Start difference. First operand 399 states and 802 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:51,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:51,906 INFO L93 Difference]: Finished difference Result 834 states and 1650 transitions. [2022-02-15 14:44:51,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:44:51,907 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:51,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:51,908 INFO L225 Difference]: With dead ends: 834 [2022-02-15 14:44:51,908 INFO L226 Difference]: Without dead ends: 801 [2022-02-15 14:44:51,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=444, Invalid=4248, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:44:51,908 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 142 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:51,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 506 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:44:51,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-02-15 14:44:51,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 397. [2022-02-15 14:44:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.015151515151515) internal successors, (798), 396 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:51,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 798 transitions. [2022-02-15 14:44:51,913 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 798 transitions. Word has length 30 [2022-02-15 14:44:51,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:51,913 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 798 transitions. [2022-02-15 14:44:51,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:51,914 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 798 transitions. [2022-02-15 14:44:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:51,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:51,914 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:51,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:52,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:52,116 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:52,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2141902077, now seen corresponding path program 110 times [2022-02-15 14:44:52,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:52,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982596676] [2022-02-15 14:44:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:52,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:52,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:52,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982596676] [2022-02-15 14:44:52,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982596676] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:52,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697985857] [2022-02-15 14:44:52,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:44:52,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:52,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:52,440 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:52,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-15 14:44:52,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:44:52,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:52,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:52,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:52,663 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 15 treesize of output 7 [2022-02-15 14:44:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:52,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:53,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:53,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:53,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697985857] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:53,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:53,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-02-15 14:44:53,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890119623] [2022-02-15 14:44:53,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:53,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 14:44:53,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:53,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 14:44:53,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:44:53,556 INFO L87 Difference]: Start difference. First operand 397 states and 798 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:55,248 INFO L93 Difference]: Finished difference Result 835 states and 1651 transitions. [2022-02-15 14:44:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:44:55,248 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:55,249 INFO L225 Difference]: With dead ends: 835 [2022-02-15 14:44:55,249 INFO L226 Difference]: Without dead ends: 799 [2022-02-15 14:44:55,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=469, Invalid=4787, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 14:44:55,250 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 164 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:55,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 463 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:44:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-02-15 14:44:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 394. [2022-02-15 14:44:55,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.017811704834606) internal successors, (793), 393 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 793 transitions. [2022-02-15 14:44:55,255 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 793 transitions. Word has length 30 [2022-02-15 14:44:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:55,255 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 793 transitions. [2022-02-15 14:44:55,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:55,255 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 793 transitions. [2022-02-15 14:44:55,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:55,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:55,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:55,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:55,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-15 14:44:55,456 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:55,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:55,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1485056713, now seen corresponding path program 111 times [2022-02-15 14:44:55,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:55,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876113803] [2022-02-15 14:44:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:55,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:55,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:55,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876113803] [2022-02-15 14:44:55,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876113803] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:55,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008330869] [2022-02-15 14:44:55,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:44:55,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:55,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:55,782 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:55,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-15 14:44:55,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:44:55,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:55,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:56,029 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 11 treesize of output 7 [2022-02-15 14:44:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:56,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:56,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:56,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:44:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:56,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008330869] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:56,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:56,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:44:56,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33727130] [2022-02-15 14:44:56,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:56,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:44:56,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:56,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:44:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:44:56,842 INFO L87 Difference]: Start difference. First operand 394 states and 793 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:58,422 INFO L93 Difference]: Finished difference Result 839 states and 1642 transitions. [2022-02-15 14:44:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:44:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:44:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:58,423 INFO L225 Difference]: With dead ends: 839 [2022-02-15 14:44:58,424 INFO L226 Difference]: Without dead ends: 830 [2022-02-15 14:44:58,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=394, Invalid=4298, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:44:58,424 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 162 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:58,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 500 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:44:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-02-15 14:44:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 423. [2022-02-15 14:44:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.0118483412322274) internal successors, (849), 422 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 849 transitions. [2022-02-15 14:44:58,429 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 849 transitions. Word has length 30 [2022-02-15 14:44:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:58,429 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 849 transitions. [2022-02-15 14:44:58,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 849 transitions. [2022-02-15 14:44:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:44:58,430 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:58,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:58,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:58,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-15 14:44:58,631 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:44:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash -602990989, now seen corresponding path program 112 times [2022-02-15 14:44:58,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:58,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106364680] [2022-02-15 14:44:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:58,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:58,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:58,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106364680] [2022-02-15 14:44:58,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106364680] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:58,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227197657] [2022-02-15 14:44:58,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:44:58,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:58,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:58,947 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:58,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-15 14:44:58,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:44:58,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:58,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:58,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:59,196 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 11 treesize of output 7 [2022-02-15 14:44:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:59,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:59,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:59,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:45:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:00,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227197657] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:00,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:00,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:45:00,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593037017] [2022-02-15 14:45:00,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:00,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:45:00,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:00,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:45:00,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:45:00,028 INFO L87 Difference]: Start difference. First operand 423 states and 849 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:01,988 INFO L93 Difference]: Finished difference Result 697 states and 1374 transitions. [2022-02-15 14:45:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:45:01,989 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:01,989 INFO L225 Difference]: With dead ends: 697 [2022-02-15 14:45:01,989 INFO L226 Difference]: Without dead ends: 682 [2022-02-15 14:45:01,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=432, Invalid=4398, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 14:45:01,990 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:01,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 542 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:45:01,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-15 14:45:01,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 419. [2022-02-15 14:45:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.011961722488038) internal successors, (841), 418 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:01,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 841 transitions. [2022-02-15 14:45:01,995 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 841 transitions. Word has length 30 [2022-02-15 14:45:01,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:01,995 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 841 transitions. [2022-02-15 14:45:01,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 841 transitions. [2022-02-15 14:45:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:01,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:01,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:02,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:02,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:02,196 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:02,197 INFO L85 PathProgramCache]: Analyzing trace with hash 865675729, now seen corresponding path program 113 times [2022-02-15 14:45:02,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:02,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074663314] [2022-02-15 14:45:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:02,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:02,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:02,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074663314] [2022-02-15 14:45:02,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074663314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:02,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624327494] [2022-02-15 14:45:02,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:45:02,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:02,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:02,537 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:02,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-15 14:45:02,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:45:02,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:02,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:45:02,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:02,780 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 11 treesize of output 7 [2022-02-15 14:45:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:03,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:03,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:03,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:45:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:03,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624327494] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:03,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:03,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:45:03,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834719328] [2022-02-15 14:45:03,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:03,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:45:03,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:45:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:45:03,632 INFO L87 Difference]: Start difference. First operand 419 states and 841 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:05,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:05,053 INFO L93 Difference]: Finished difference Result 862 states and 1690 transitions. [2022-02-15 14:45:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 14:45:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:05,054 INFO L225 Difference]: With dead ends: 862 [2022-02-15 14:45:05,054 INFO L226 Difference]: Without dead ends: 817 [2022-02-15 14:45:05,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=367, Invalid=3539, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 14:45:05,055 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 146 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:05,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 531 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1888 Invalid, 0 Unknown, 157 Unchecked, 0.7s Time] [2022-02-15 14:45:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-02-15 14:45:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 406. [2022-02-15 14:45:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2022-02-15 14:45:05,060 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2022-02-15 14:45:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:05,060 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2022-02-15 14:45:05,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2022-02-15 14:45:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:05,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:05,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:05,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-02-15 14:45:05,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-15 14:45:05,261 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:05,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:05,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1480998639, now seen corresponding path program 114 times [2022-02-15 14:45:05,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:05,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035809444] [2022-02-15 14:45:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:05,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:05,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:05,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035809444] [2022-02-15 14:45:05,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035809444] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:05,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739622319] [2022-02-15 14:45:05,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:45:05,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:05,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:05,569 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:05,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-15 14:45:05,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:45:05,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:05,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:05,819 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 15 treesize of output 7 [2022-02-15 14:45:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:06,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:06,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:06,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:45:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:06,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739622319] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:06,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:06,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:45:06,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244987899] [2022-02-15 14:45:06,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:06,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:45:06,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:06,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:45:06,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:45:06,623 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:08,281 INFO L93 Difference]: Finished difference Result 866 states and 1694 transitions. [2022-02-15 14:45:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:45:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:08,283 INFO L225 Difference]: With dead ends: 866 [2022-02-15 14:45:08,283 INFO L226 Difference]: Without dead ends: 833 [2022-02-15 14:45:08,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=390, Invalid=4032, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 14:45:08,283 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 151 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:08,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 631 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:45:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-02-15 14:45:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 403. [2022-02-15 14:45:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2022-02-15 14:45:08,291 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2022-02-15 14:45:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:08,291 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2022-02-15 14:45:08,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2022-02-15 14:45:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:08,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:08,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:08,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:08,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-02-15 14:45:08,507 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:08,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:08,508 INFO L85 PathProgramCache]: Analyzing trace with hash 474459917, now seen corresponding path program 115 times [2022-02-15 14:45:08,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:08,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817066427] [2022-02-15 14:45:08,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:08,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:08,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:08,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817066427] [2022-02-15 14:45:08,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817066427] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:08,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145340534] [2022-02-15 14:45:08,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:45:08,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:08,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:08,835 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:08,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-15 14:45:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:08,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:08,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:09,086 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 11 treesize of output 7 [2022-02-15 14:45:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:09,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:09,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:09,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:45:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:10,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145340534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:10,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:10,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-02-15 14:45:10,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775232033] [2022-02-15 14:45:10,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:10,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 14:45:10,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:10,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 14:45:10,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:45:10,006 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:11,629 INFO L93 Difference]: Finished difference Result 888 states and 1730 transitions. [2022-02-15 14:45:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:45:11,630 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:11,631 INFO L225 Difference]: With dead ends: 888 [2022-02-15 14:45:11,631 INFO L226 Difference]: Without dead ends: 870 [2022-02-15 14:45:11,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=401, Invalid=4429, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 14:45:11,631 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 153 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:11,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 647 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2143 Invalid, 0 Unknown, 274 Unchecked, 0.8s Time] [2022-02-15 14:45:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-02-15 14:45:11,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 435. [2022-02-15 14:45:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.9907834101382489) internal successors, (864), 434 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 864 transitions. [2022-02-15 14:45:11,638 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 864 transitions. Word has length 30 [2022-02-15 14:45:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:11,638 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 864 transitions. [2022-02-15 14:45:11,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 864 transitions. [2022-02-15 14:45:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:11,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:11,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:11,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:11,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-02-15 14:45:11,844 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:11,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1951485783, now seen corresponding path program 116 times [2022-02-15 14:45:11,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:11,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987100496] [2022-02-15 14:45:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:11,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:12,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:12,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987100496] [2022-02-15 14:45:12,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987100496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:12,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129172762] [2022-02-15 14:45:12,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:45:12,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:12,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:12,190 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:12,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-15 14:45:12,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:45:12,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:12,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:12,450 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 15 treesize of output 7 [2022-02-15 14:45:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:12,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:13,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:13,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-15 14:45:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:13,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129172762] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:13,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:13,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-02-15 14:45:13,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716086248] [2022-02-15 14:45:13,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:13,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 14:45:13,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:13,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 14:45:13,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:45:13,336 INFO L87 Difference]: Start difference. First operand 435 states and 864 transitions. Second operand has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:15,141 INFO L93 Difference]: Finished difference Result 867 states and 1692 transitions. [2022-02-15 14:45:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 14:45:15,141 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:15,143 INFO L225 Difference]: With dead ends: 867 [2022-02-15 14:45:15,143 INFO L226 Difference]: Without dead ends: 844 [2022-02-15 14:45:15,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=428, Invalid=4828, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 14:45:15,143 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:15,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 655 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2229 Invalid, 0 Unknown, 126 Unchecked, 0.8s Time] [2022-02-15 14:45:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-02-15 14:45:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 400. [2022-02-15 14:45:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0150375939849625) internal successors, (804), 399 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 804 transitions. [2022-02-15 14:45:15,149 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 804 transitions. Word has length 30 [2022-02-15 14:45:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:15,149 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 804 transitions. [2022-02-15 14:45:15,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 804 transitions. [2022-02-15 14:45:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:15,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:15,150 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:15,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:15,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-02-15 14:45:15,351 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:15,352 INFO L85 PathProgramCache]: Analyzing trace with hash -8943343, now seen corresponding path program 117 times [2022-02-15 14:45:15,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:15,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028324318] [2022-02-15 14:45:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:15,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:15,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:15,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028324318] [2022-02-15 14:45:15,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028324318] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:15,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330511562] [2022-02-15 14:45:15,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:45:15,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:15,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:15,678 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:15,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-15 14:45:15,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:45:15,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:15,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:15,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:15,973 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 11 treesize of output 7 [2022-02-15 14:45:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:16,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:16,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:16,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-02-15 14:45:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:16,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330511562] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:16,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:16,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-02-15 14:45:16,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046075889] [2022-02-15 14:45:16,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:16,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 14:45:16,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:16,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 14:45:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2240, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 14:45:16,971 INFO L87 Difference]: Start difference. First operand 400 states and 804 transitions. Second operand has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:18,781 INFO L93 Difference]: Finished difference Result 854 states and 1668 transitions. [2022-02-15 14:45:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:45:18,781 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:18,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:18,782 INFO L225 Difference]: With dead ends: 854 [2022-02-15 14:45:18,782 INFO L226 Difference]: Without dead ends: 847 [2022-02-15 14:45:18,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=440, Invalid=5110, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 14:45:18,783 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 181 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:18,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 738 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:45:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-02-15 14:45:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 388. [2022-02-15 14:45:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2022-02-15 14:45:18,788 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2022-02-15 14:45:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:18,788 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2022-02-15 14:45:18,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:18,788 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2022-02-15 14:45:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:18,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:18,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:18,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-02-15 14:45:18,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:18,990 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash 962091669, now seen corresponding path program 118 times [2022-02-15 14:45:18,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:18,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646943009] [2022-02-15 14:45:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:18,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:19,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:19,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646943009] [2022-02-15 14:45:19,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646943009] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:19,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722266183] [2022-02-15 14:45:19,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:45:19,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:19,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:19,281 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:19,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-15 14:45:19,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:45:19,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:19,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:19,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:19,382 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 15 treesize of output 7 [2022-02-15 14:45:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:19,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:20,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:20,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:45:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:20,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722266183] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:20,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:20,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-02-15 14:45:20,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519650925] [2022-02-15 14:45:20,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:20,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 14:45:20,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:20,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 14:45:20,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 14:45:20,177 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:21,560 INFO L93 Difference]: Finished difference Result 794 states and 1567 transitions. [2022-02-15 14:45:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:45:21,560 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:21,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:21,561 INFO L225 Difference]: With dead ends: 794 [2022-02-15 14:45:21,561 INFO L226 Difference]: Without dead ends: 785 [2022-02-15 14:45:21,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=412, Invalid=3128, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 14:45:21,562 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 132 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:21,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 374 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:45:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-02-15 14:45:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 415. [2022-02-15 14:45:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.002415458937198) internal successors, (829), 414 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 829 transitions. [2022-02-15 14:45:21,567 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 829 transitions. Word has length 30 [2022-02-15 14:45:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:21,567 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 829 transitions. [2022-02-15 14:45:21,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 829 transitions. [2022-02-15 14:45:21,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:21,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:21,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:21,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:21,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:21,768 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1844157393, now seen corresponding path program 119 times [2022-02-15 14:45:21,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:21,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445000480] [2022-02-15 14:45:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:21,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:22,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:22,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445000480] [2022-02-15 14:45:22,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445000480] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:22,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810267108] [2022-02-15 14:45:22,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:45:22,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:22,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:22,065 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:22,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-15 14:45:22,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:45:22,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:22,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:45:22,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:22,160 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 11 treesize of output 7 [2022-02-15 14:45:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:22,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:22,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:22,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:45:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:22,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810267108] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:22,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:22,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-02-15 14:45:22,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770628096] [2022-02-15 14:45:22,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:22,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 14:45:22,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:22,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 14:45:22,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 14:45:22,974 INFO L87 Difference]: Start difference. First operand 415 states and 829 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:24,397 INFO L93 Difference]: Finished difference Result 679 states and 1351 transitions. [2022-02-15 14:45:24,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:45:24,397 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:24,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:24,398 INFO L225 Difference]: With dead ends: 679 [2022-02-15 14:45:24,398 INFO L226 Difference]: Without dead ends: 664 [2022-02-15 14:45:24,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=377, Invalid=2703, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 14:45:24,399 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 141 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:24,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 366 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:45:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-02-15 14:45:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 413. [2022-02-15 14:45:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0024271844660193) internal successors, (825), 412 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 825 transitions. [2022-02-15 14:45:24,403 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 825 transitions. Word has length 30 [2022-02-15 14:45:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:24,403 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 825 transitions. [2022-02-15 14:45:24,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 825 transitions. [2022-02-15 14:45:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:24,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:24,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:24,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:24,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-02-15 14:45:24,607 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash -982143185, now seen corresponding path program 120 times [2022-02-15 14:45:24,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:24,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454350059] [2022-02-15 14:45:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:24,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:24,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:24,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454350059] [2022-02-15 14:45:24,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454350059] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:24,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848453487] [2022-02-15 14:45:24,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:45:24,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:24,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:24,921 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:24,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-15 14:45:24,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:45:24,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:45:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:25,018 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 11 treesize of output 7 [2022-02-15 14:45:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:25,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:25,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:25,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:45:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:25,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848453487] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:25,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:25,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-02-15 14:45:25,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423130487] [2022-02-15 14:45:25,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:25,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 14:45:25,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:25,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 14:45:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 14:45:25,819 INFO L87 Difference]: Start difference. First operand 413 states and 825 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:27,172 INFO L93 Difference]: Finished difference Result 799 states and 1570 transitions. [2022-02-15 14:45:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:45:27,173 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:27,173 INFO L225 Difference]: With dead ends: 799 [2022-02-15 14:45:27,173 INFO L226 Difference]: Without dead ends: 762 [2022-02-15 14:45:27,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=405, Invalid=2901, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 14:45:27,174 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 167 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:27,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 348 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:45:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-02-15 14:45:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 411. [2022-02-15 14:45:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.002439024390244) internal successors, (821), 410 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 821 transitions. [2022-02-15 14:45:27,179 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 821 transitions. Word has length 30 [2022-02-15 14:45:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:27,179 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 821 transitions. [2022-02-15 14:45:27,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 821 transitions. [2022-02-15 14:45:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:27,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:27,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:27,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-02-15 14:45:27,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:27,381 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:27,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:27,381 INFO L85 PathProgramCache]: Analyzing trace with hash -60441045, now seen corresponding path program 121 times [2022-02-15 14:45:27,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:27,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357716809] [2022-02-15 14:45:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:27,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:27,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:27,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357716809] [2022-02-15 14:45:27,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357716809] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:27,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173128003] [2022-02-15 14:45:27,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:45:27,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:27,696 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:27,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-15 14:45:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:27,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:27,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:27,794 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 15 treesize of output 7 [2022-02-15 14:45:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:28,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:28,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:28,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:45:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:28,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173128003] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:28,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:28,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-02-15 14:45:28,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757686976] [2022-02-15 14:45:28,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:28,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 14:45:28,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:28,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 14:45:28,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 14:45:28,608 INFO L87 Difference]: Start difference. First operand 411 states and 821 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:29,961 INFO L93 Difference]: Finished difference Result 784 states and 1548 transitions. [2022-02-15 14:45:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:45:29,961 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:29,962 INFO L225 Difference]: With dead ends: 784 [2022-02-15 14:45:29,962 INFO L226 Difference]: Without dead ends: 741 [2022-02-15 14:45:29,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=395, Invalid=3027, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 14:45:29,962 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 167 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:29,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 390 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:45:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-02-15 14:45:29,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 396. [2022-02-15 14:45:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2022-02-15 14:45:29,967 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2022-02-15 14:45:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:29,967 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2022-02-15 14:45:29,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:29,967 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2022-02-15 14:45:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:29,968 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:29,968 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:29,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:30,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:30,170 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:30,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:30,170 INFO L85 PathProgramCache]: Analyzing trace with hash -874861461, now seen corresponding path program 122 times [2022-02-15 14:45:30,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:30,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577143487] [2022-02-15 14:45:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:30,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:30,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:30,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577143487] [2022-02-15 14:45:30,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577143487] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:30,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620989912] [2022-02-15 14:45:30,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:45:30,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:30,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:30,456 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:30,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-15 14:45:30,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:45:30,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:30,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:30,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:30,552 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 11 treesize of output 7 [2022-02-15 14:45:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:30,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:31,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:31,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:45:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:31,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620989912] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:31,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:31,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-02-15 14:45:31,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705056675] [2022-02-15 14:45:31,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:31,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 14:45:31,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:31,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 14:45:31,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 14:45:31,449 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 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) [2022-02-15 14:45:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:33,094 INFO L93 Difference]: Finished difference Result 833 states and 1627 transitions. [2022-02-15 14:45:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 14:45:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:33,096 INFO L225 Difference]: With dead ends: 833 [2022-02-15 14:45:33,096 INFO L226 Difference]: Without dead ends: 824 [2022-02-15 14:45:33,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=476, Invalid=3556, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 14:45:33,096 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:33,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 426 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:45:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-02-15 14:45:33,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 413. [2022-02-15 14:45:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:33,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2022-02-15 14:45:33,102 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2022-02-15 14:45:33,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:33,102 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2022-02-15 14:45:33,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 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) [2022-02-15 14:45:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2022-02-15 14:45:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:33,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:33,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:33,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:33,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-15 14:45:33,303 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:33,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:33,303 INFO L85 PathProgramCache]: Analyzing trace with hash 7204263, now seen corresponding path program 123 times [2022-02-15 14:45:33,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:33,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017356041] [2022-02-15 14:45:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:33,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:33,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:33,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017356041] [2022-02-15 14:45:33,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017356041] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:33,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976846534] [2022-02-15 14:45:33,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:45:33,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:33,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:33,594 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:33,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-15 14:45:33,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:45:33,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:33,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:33,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:33,691 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 11 treesize of output 7 [2022-02-15 14:45:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:34,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:34,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:34,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:45:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:34,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976846534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:34,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:34,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-02-15 14:45:34,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611461012] [2022-02-15 14:45:34,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:34,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 14:45:34,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:34,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 14:45:34,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 14:45:34,616 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 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) [2022-02-15 14:45:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:36,370 INFO L93 Difference]: Finished difference Result 717 states and 1409 transitions. [2022-02-15 14:45:36,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:45:36,370 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:36,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:36,371 INFO L225 Difference]: With dead ends: 717 [2022-02-15 14:45:36,371 INFO L226 Difference]: Without dead ends: 702 [2022-02-15 14:45:36,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=493, Invalid=3413, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 14:45:36,371 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 156 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:36,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 417 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:45:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-02-15 14:45:36,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 411. [2022-02-15 14:45:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-02-15 14:45:36,378 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-02-15 14:45:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:36,378 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-02-15 14:45:36,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 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) [2022-02-15 14:45:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-02-15 14:45:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:36,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:36,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:36,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:36,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-15 14:45:36,599 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:36,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1475870981, now seen corresponding path program 124 times [2022-02-15 14:45:36,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:36,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476693761] [2022-02-15 14:45:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:36,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:36,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:36,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476693761] [2022-02-15 14:45:36,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476693761] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:36,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114344069] [2022-02-15 14:45:36,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:45:36,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:36,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:36,919 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:36,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-15 14:45:36,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:45:36,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:36,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:36,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:37,018 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 15 treesize of output 7 [2022-02-15 14:45:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:37,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:37,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:37,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:45:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:37,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114344069] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:37,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:37,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-02-15 14:45:37,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557172847] [2022-02-15 14:45:37,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:37,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 14:45:37,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:37,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 14:45:37,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-15 14:45:37,805 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:39,255 INFO L93 Difference]: Finished difference Result 819 states and 1603 transitions. [2022-02-15 14:45:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:45:39,255 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:39,256 INFO L225 Difference]: With dead ends: 819 [2022-02-15 14:45:39,256 INFO L226 Difference]: Without dead ends: 782 [2022-02-15 14:45:39,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=395, Invalid=2911, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 14:45:39,257 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 166 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:39,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 387 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:45:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-02-15 14:45:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 409. [2022-02-15 14:45:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2022-02-15 14:45:39,262 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2022-02-15 14:45:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:39,262 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2022-02-15 14:45:39,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2022-02-15 14:45:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:39,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:39,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:39,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-02-15 14:45:39,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-15 14:45:39,463 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:39,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1897394175, now seen corresponding path program 125 times [2022-02-15 14:45:39,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:39,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173262108] [2022-02-15 14:45:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:39,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:39,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:39,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173262108] [2022-02-15 14:45:39,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173262108] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:39,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890858575] [2022-02-15 14:45:39,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:45:39,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:39,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:39,744 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:39,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-15 14:45:39,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:45:39,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:39,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:45:39,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:39,842 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 11 treesize of output 7 [2022-02-15 14:45:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:40,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:40,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:40,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:45:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:40,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890858575] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:40,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:40,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-02-15 14:45:40,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215449302] [2022-02-15 14:45:40,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:40,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 14:45:40,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 14:45:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 14:45:40,636 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2022-02-15 14:45:41,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:41,997 INFO L93 Difference]: Finished difference Result 798 states and 1571 transitions. [2022-02-15 14:45:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 14:45:41,997 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:41,998 INFO L225 Difference]: With dead ends: 798 [2022-02-15 14:45:41,998 INFO L226 Difference]: Without dead ends: 755 [2022-02-15 14:45:41,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=377, Invalid=2815, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 14:45:41,998 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 148 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:41,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 418 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:45:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-02-15 14:45:42,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 397. [2022-02-15 14:45:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:42,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2022-02-15 14:45:42,003 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2022-02-15 14:45:42,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:42,003 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2022-02-15 14:45:42,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2022-02-15 14:45:42,003 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2022-02-15 14:45:42,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:42,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:42,004 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:42,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:42,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:42,204 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1122547601, now seen corresponding path program 126 times [2022-02-15 14:45:42,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:42,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205646092] [2022-02-15 14:45:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:42,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:42,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:42,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205646092] [2022-02-15 14:45:42,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205646092] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:42,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552041932] [2022-02-15 14:45:42,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:45:42,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:42,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:42,496 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:42,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-15 14:45:42,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:45:42,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:42,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:45:42,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:42,594 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 11 treesize of output 7 [2022-02-15 14:45:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:42,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:43,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:43,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:45:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:43,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552041932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:43,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:43,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-15 14:45:43,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104261724] [2022-02-15 14:45:43,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:43,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 14:45:43,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 14:45:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:45:43,448 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-02-15 14:45:45,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:45,445 INFO L93 Difference]: Finished difference Result 873 states and 1718 transitions. [2022-02-15 14:45:45,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:45:45,446 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:45,447 INFO L225 Difference]: With dead ends: 873 [2022-02-15 14:45:45,447 INFO L226 Difference]: Without dead ends: 864 [2022-02-15 14:45:45,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=518, Invalid=4038, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:45:45,447 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 190 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:45,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 426 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:45:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-02-15 14:45:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 411. [2022-02-15 14:45:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2022-02-15 14:45:45,452 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2022-02-15 14:45:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:45,453 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2022-02-15 14:45:45,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-02-15 14:45:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2022-02-15 14:45:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:45,453 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:45,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:45,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:45,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-02-15 14:45:45,654 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:45,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2004613325, now seen corresponding path program 127 times [2022-02-15 14:45:45,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:45,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182429309] [2022-02-15 14:45:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:45,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:45,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:45,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182429309] [2022-02-15 14:45:45,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182429309] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:45,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703479148] [2022-02-15 14:45:45,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:45:45,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:45,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:45,951 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:45,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-15 14:45:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:45,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:45,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:46,047 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 15 treesize of output 7 [2022-02-15 14:45:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:46,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:46,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:46,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:45:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:46,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703479148] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:46,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:46,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-15 14:45:46,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138452904] [2022-02-15 14:45:46,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:46,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 14:45:46,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:46,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 14:45:46,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:45:46,927 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-02-15 14:45:49,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:49,120 INFO L93 Difference]: Finished difference Result 730 states and 1445 transitions. [2022-02-15 14:45:49,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:45:49,120 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:49,121 INFO L225 Difference]: With dead ends: 730 [2022-02-15 14:45:49,121 INFO L226 Difference]: Without dead ends: 715 [2022-02-15 14:45:49,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=559, Invalid=3997, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:45:49,121 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 178 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:49,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 411 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:45:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-02-15 14:45:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 409. [2022-02-15 14:45:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2022-02-15 14:45:49,126 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2022-02-15 14:45:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:49,126 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2022-02-15 14:45:49,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-02-15 14:45:49,126 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2022-02-15 14:45:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:49,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:49,127 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:49,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-02-15 14:45:49,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-02-15 14:45:49,327 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash -821687253, now seen corresponding path program 128 times [2022-02-15 14:45:49,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:49,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052070892] [2022-02-15 14:45:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:49,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:49,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:49,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052070892] [2022-02-15 14:45:49,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052070892] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:49,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15016868] [2022-02-15 14:45:49,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:45:49,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:49,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:49,635 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:49,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-15 14:45:49,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:45:49,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:49,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:49,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:49,737 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 11 treesize of output 7 [2022-02-15 14:45:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:50,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:50,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:50,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:45:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:50,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15016868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:50,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:50,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2022-02-15 14:45:50,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094645440] [2022-02-15 14:45:50,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:50,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 14:45:50,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:50,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 14:45:50,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 14:45:50,634 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 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) [2022-02-15 14:45:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:52,891 INFO L93 Difference]: Finished difference Result 956 states and 1875 transitions. [2022-02-15 14:45:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 14:45:52,891 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:52,892 INFO L225 Difference]: With dead ends: 956 [2022-02-15 14:45:52,892 INFO L226 Difference]: Without dead ends: 904 [2022-02-15 14:45:52,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 29 SyntacticMatches, 10 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=835, Invalid=5017, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 14:45:52,893 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 253 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 2295 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:52,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 459 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2295 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:45:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-02-15 14:45:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 408. [2022-02-15 14:45:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9950859950859952) internal successors, (812), 407 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 812 transitions. [2022-02-15 14:45:52,898 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 812 transitions. Word has length 30 [2022-02-15 14:45:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:52,898 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 812 transitions. [2022-02-15 14:45:52,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 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) [2022-02-15 14:45:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 812 transitions. [2022-02-15 14:45:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:52,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:52,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:52,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:53,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:53,099 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:53,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:53,100 INFO L85 PathProgramCache]: Analyzing trace with hash 66931137, now seen corresponding path program 129 times [2022-02-15 14:45:53,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:53,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028063623] [2022-02-15 14:45:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:53,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:53,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:53,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028063623] [2022-02-15 14:45:53,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028063623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:53,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12457323] [2022-02-15 14:45:53,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:45:53,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:53,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:53,406 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:53,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-15 14:45:53,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:45:53,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:53,505 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 11 treesize of output 7 [2022-02-15 14:45:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:53,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:54,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:54,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:45:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:54,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12457323] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:54,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:54,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-15 14:45:54,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775715152] [2022-02-15 14:45:54,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:54,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 14:45:54,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:54,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 14:45:54,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:45:54,356 INFO L87 Difference]: Start difference. First operand 408 states and 812 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-02-15 14:45:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:55,648 INFO L93 Difference]: Finished difference Result 798 states and 1566 transitions. [2022-02-15 14:45:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:45:55,649 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:55,650 INFO L225 Difference]: With dead ends: 798 [2022-02-15 14:45:55,650 INFO L226 Difference]: Without dead ends: 789 [2022-02-15 14:45:55,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=370, Invalid=3052, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 14:45:55,650 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 144 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:55,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 317 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:45:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-02-15 14:45:55,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 410. [2022-02-15 14:45:55,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9926650366748166) internal successors, (815), 409 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 815 transitions. [2022-02-15 14:45:55,655 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 815 transitions. Word has length 30 [2022-02-15 14:45:55,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:55,655 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 815 transitions. [2022-02-15 14:45:55,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-02-15 14:45:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 815 transitions. [2022-02-15 14:45:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:55,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:55,656 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:55,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-02-15 14:45:55,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:55,857 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:55,857 INFO L85 PathProgramCache]: Analyzing trace with hash 948996861, now seen corresponding path program 130 times [2022-02-15 14:45:55,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:55,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618044027] [2022-02-15 14:45:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:55,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:56,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:56,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618044027] [2022-02-15 14:45:56,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618044027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:56,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454445090] [2022-02-15 14:45:56,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:45:56,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:56,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:56,168 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:56,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-15 14:45:56,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:45:56,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:56,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:56,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:56,264 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 15 treesize of output 7 [2022-02-15 14:45:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:56,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:57,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:57,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:45:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:57,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454445090] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:57,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:57,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-15 14:45:57,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885298393] [2022-02-15 14:45:57,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:57,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 14:45:57,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:57,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 14:45:57,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:45:57,175 INFO L87 Difference]: Start difference. First operand 410 states and 815 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-02-15 14:45:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:58,771 INFO L93 Difference]: Finished difference Result 681 states and 1339 transitions. [2022-02-15 14:45:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:45:58,771 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:45:58,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:58,772 INFO L225 Difference]: With dead ends: 681 [2022-02-15 14:45:58,772 INFO L226 Difference]: Without dead ends: 648 [2022-02-15 14:45:58,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=416, Invalid=3244, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 14:45:58,773 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:58,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 376 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1583 Invalid, 0 Unknown, 57 Unchecked, 0.6s Time] [2022-02-15 14:45:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-02-15 14:45:58,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 400. [2022-02-15 14:45:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0050125313283207) internal successors, (800), 399 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 800 transitions. [2022-02-15 14:45:58,777 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 800 transitions. Word has length 30 [2022-02-15 14:45:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:58,777 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 800 transitions. [2022-02-15 14:45:58,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-02-15 14:45:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 800 transitions. [2022-02-15 14:45:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:45:58,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:58,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:58,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-02-15 14:45:58,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:58,979 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:45:58,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:58,979 INFO L85 PathProgramCache]: Analyzing trace with hash 70989211, now seen corresponding path program 131 times [2022-02-15 14:45:58,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:58,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233280590] [2022-02-15 14:45:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:58,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:59,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:59,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233280590] [2022-02-15 14:45:59,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233280590] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:59,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586856965] [2022-02-15 14:45:59,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:45:59,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:59,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:59,278 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:59,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-15 14:45:59,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:45:59,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:45:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:59,376 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 15 treesize of output 7 [2022-02-15 14:45:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:59,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:00,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:00,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:00,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586856965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:00,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:00,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-15 14:46:00,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245191518] [2022-02-15 14:46:00,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:00,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 14:46:00,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:00,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 14:46:00,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 14:46:00,272 INFO L87 Difference]: Start difference. First operand 400 states and 800 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2022-02-15 14:46:01,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:01,576 INFO L93 Difference]: Finished difference Result 781 states and 1539 transitions. [2022-02-15 14:46:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:46:01,577 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:01,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:01,577 INFO L225 Difference]: With dead ends: 781 [2022-02-15 14:46:01,577 INFO L226 Difference]: Without dead ends: 748 [2022-02-15 14:46:01,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=380, Invalid=3160, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 14:46:01,578 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 153 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:01,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 366 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:46:01,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-02-15 14:46:01,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 395. [2022-02-15 14:46:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2022-02-15 14:46:01,583 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2022-02-15 14:46:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:01,583 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2022-02-15 14:46:01,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 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) [2022-02-15 14:46:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2022-02-15 14:46:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:01,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:01,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:01,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:01,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:01,784 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:01,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:01,784 INFO L85 PathProgramCache]: Analyzing trace with hash -936370625, now seen corresponding path program 132 times [2022-02-15 14:46:01,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:01,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18538369] [2022-02-15 14:46:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:01,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:02,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:02,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18538369] [2022-02-15 14:46:02,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18538369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:02,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740658657] [2022-02-15 14:46:02,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:46:02,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:02,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:02,100 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:02,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-15 14:46:02,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:46:02,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:02,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:46:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:02,262 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 11 treesize of output 7 [2022-02-15 14:46:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:02,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:02,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:02,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:03,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740658657] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:03,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:03,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:03,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915204754] [2022-02-15 14:46:03,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:03,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:03,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:03,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:03,144 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:04,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:04,661 INFO L93 Difference]: Finished difference Result 816 states and 1604 transitions. [2022-02-15 14:46:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 14:46:04,662 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:04,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:04,662 INFO L225 Difference]: With dead ends: 816 [2022-02-15 14:46:04,663 INFO L226 Difference]: Without dead ends: 807 [2022-02-15 14:46:04,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=453, Invalid=3969, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 14:46:04,663 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 129 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:04,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 416 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:46:04,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-02-15 14:46:04,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 413. [2022-02-15 14:46:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:04,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2022-02-15 14:46:04,668 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2022-02-15 14:46:04,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:04,668 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2022-02-15 14:46:04,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:04,668 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2022-02-15 14:46:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:04,669 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:04,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:04,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-02-15 14:46:04,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-02-15 14:46:04,869 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:04,870 INFO L85 PathProgramCache]: Analyzing trace with hash -54304901, now seen corresponding path program 133 times [2022-02-15 14:46:04,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:04,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390557614] [2022-02-15 14:46:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:04,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:05,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:05,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390557614] [2022-02-15 14:46:05,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390557614] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:05,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544116942] [2022-02-15 14:46:05,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:46:05,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:05,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:05,185 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:05,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-15 14:46:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:05,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:05,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:05,346 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 15 treesize of output 7 [2022-02-15 14:46:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:05,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:06,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:06,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:06,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544116942] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:06,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:06,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:06,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507259172] [2022-02-15 14:46:06,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:06,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:06,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:06,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:06,327 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:08,035 INFO L93 Difference]: Finished difference Result 700 states and 1386 transitions. [2022-02-15 14:46:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:46:08,036 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:08,036 INFO L225 Difference]: With dead ends: 700 [2022-02-15 14:46:08,036 INFO L226 Difference]: Without dead ends: 685 [2022-02-15 14:46:08,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=482, Invalid=3940, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 14:46:08,037 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 157 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:08,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 395 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:46:08,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-02-15 14:46:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 411. [2022-02-15 14:46:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-02-15 14:46:08,041 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-02-15 14:46:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:08,041 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-02-15 14:46:08,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-02-15 14:46:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:08,042 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:08,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:08,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:08,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-02-15 14:46:08,242 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:08,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:08,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1414361817, now seen corresponding path program 134 times [2022-02-15 14:46:08,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:08,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50900905] [2022-02-15 14:46:08,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:08,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:08,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:08,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50900905] [2022-02-15 14:46:08,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50900905] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:08,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292288987] [2022-02-15 14:46:08,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:46:08,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:08,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:08,558 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:08,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-15 14:46:08,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:46:08,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:08,716 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 11 treesize of output 7 [2022-02-15 14:46:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:09,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:09,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:09,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:46:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:09,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292288987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:09,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:09,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-02-15 14:46:09,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145606984] [2022-02-15 14:46:09,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:09,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 14:46:09,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:09,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 14:46:09,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:46:09,675 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:11,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:11,389 INFO L93 Difference]: Finished difference Result 849 states and 1651 transitions. [2022-02-15 14:46:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 14:46:11,389 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:11,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:11,390 INFO L225 Difference]: With dead ends: 849 [2022-02-15 14:46:11,390 INFO L226 Difference]: Without dead ends: 812 [2022-02-15 14:46:11,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=569, Invalid=4543, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 14:46:11,390 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 183 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:11,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 470 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:46:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-02-15 14:46:11,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 409. [2022-02-15 14:46:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2022-02-15 14:46:11,396 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2022-02-15 14:46:11,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:11,396 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2022-02-15 14:46:11,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2022-02-15 14:46:11,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:11,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:11,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:11,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:11,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-02-15 14:46:11,597 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:11,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:11,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1958903339, now seen corresponding path program 135 times [2022-02-15 14:46:11,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:11,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511274788] [2022-02-15 14:46:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:11,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:11,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:11,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511274788] [2022-02-15 14:46:11,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511274788] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:11,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015727250] [2022-02-15 14:46:11,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:46:11,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:11,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:11,912 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:11,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-15 14:46:11,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:46:11,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:11,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:11,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:12,079 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 11 treesize of output 7 [2022-02-15 14:46:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:12,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:12,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:12,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:46:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:13,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015727250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:13,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:13,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-02-15 14:46:13,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094028425] [2022-02-15 14:46:13,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:13,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 14:46:13,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:13,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 14:46:13,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:46:13,054 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:14,632 INFO L93 Difference]: Finished difference Result 828 states and 1619 transitions. [2022-02-15 14:46:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:46:14,633 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:14,634 INFO L225 Difference]: With dead ends: 828 [2022-02-15 14:46:14,634 INFO L226 Difference]: Without dead ends: 785 [2022-02-15 14:46:14,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=543, Invalid=4427, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 14:46:14,634 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 185 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:14,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 507 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:46:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-02-15 14:46:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 397. [2022-02-15 14:46:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2022-02-15 14:46:14,640 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2022-02-15 14:46:14,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:14,640 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2022-02-15 14:46:14,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2022-02-15 14:46:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:14,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:14,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:14,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:14,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:14,844 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:14,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:14,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1061038437, now seen corresponding path program 136 times [2022-02-15 14:46:14,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:14,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742482713] [2022-02-15 14:46:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:14,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:15,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:15,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742482713] [2022-02-15 14:46:15,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742482713] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:15,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505013731] [2022-02-15 14:46:15,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:46:15,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:15,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:15,158 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:15,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-15 14:46:15,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:46:15,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:15,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:15,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:15,315 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 15 treesize of output 7 [2022-02-15 14:46:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:15,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:16,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:16,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:16,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505013731] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:16,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:16,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:16,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198551765] [2022-02-15 14:46:16,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:16,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:16,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:16,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:16,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:16,186 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:18,048 INFO L93 Difference]: Finished difference Result 885 states and 1740 transitions. [2022-02-15 14:46:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:46:18,049 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:18,050 INFO L225 Difference]: With dead ends: 885 [2022-02-15 14:46:18,050 INFO L226 Difference]: Without dead ends: 876 [2022-02-15 14:46:18,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=557, Invalid=4699, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 14:46:18,050 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 209 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:18,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 382 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:46:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-02-15 14:46:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 411. [2022-02-15 14:46:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2022-02-15 14:46:18,055 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2022-02-15 14:46:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:18,056 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2022-02-15 14:46:18,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2022-02-15 14:46:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:18,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:18,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:18,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:18,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:18,257 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1943104161, now seen corresponding path program 137 times [2022-02-15 14:46:18,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:18,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838853108] [2022-02-15 14:46:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:18,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:18,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:18,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838853108] [2022-02-15 14:46:18,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838853108] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:18,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135929192] [2022-02-15 14:46:18,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:46:18,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:18,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:18,569 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:18,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-15 14:46:18,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:46:18,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:18,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:46:18,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:18,732 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 11 treesize of output 7 [2022-02-15 14:46:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:19,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:19,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:19,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:19,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135929192] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:19,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:19,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:19,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486760901] [2022-02-15 14:46:19,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:19,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:19,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:19,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:19,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:19,700 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:21,891 INFO L93 Difference]: Finished difference Result 739 states and 1461 transitions. [2022-02-15 14:46:21,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:46:21,891 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:21,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:21,892 INFO L225 Difference]: With dead ends: 739 [2022-02-15 14:46:21,892 INFO L226 Difference]: Without dead ends: 724 [2022-02-15 14:46:21,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=596, Invalid=4660, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 14:46:21,892 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 190 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:21,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 432 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2206 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:46:21,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-02-15 14:46:21,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 409. [2022-02-15 14:46:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2022-02-15 14:46:21,897 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2022-02-15 14:46:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:21,897 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2022-02-15 14:46:21,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2022-02-15 14:46:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:21,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:21,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:21,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-02-15 14:46:22,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-02-15 14:46:22,098 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:22,099 INFO L85 PathProgramCache]: Analyzing trace with hash -883196417, now seen corresponding path program 138 times [2022-02-15 14:46:22,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:22,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196855866] [2022-02-15 14:46:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:22,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:22,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:22,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196855866] [2022-02-15 14:46:22,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196855866] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:22,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819275255] [2022-02-15 14:46:22,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:46:22,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:22,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:22,406 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:22,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-15 14:46:22,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:46:22,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:22,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:22,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:22,565 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 11 treesize of output 7 [2022-02-15 14:46:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:22,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:23,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:23,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:46:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:23,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819275255] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:23,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:23,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-02-15 14:46:23,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289338466] [2022-02-15 14:46:23,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:23,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 14:46:23,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:23,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 14:46:23,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:46:23,523 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:25,806 INFO L93 Difference]: Finished difference Result 956 states and 1877 transitions. [2022-02-15 14:46:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 14:46:25,806 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:25,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:25,807 INFO L225 Difference]: With dead ends: 956 [2022-02-15 14:46:25,807 INFO L226 Difference]: Without dead ends: 904 [2022-02-15 14:46:25,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=846, Invalid=5634, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 14:46:25,808 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 266 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:25,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 458 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2440 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:46:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-02-15 14:46:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 408. [2022-02-15 14:46:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9950859950859952) internal successors, (812), 407 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 812 transitions. [2022-02-15 14:46:25,813 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 812 transitions. Word has length 30 [2022-02-15 14:46:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:25,814 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 812 transitions. [2022-02-15 14:46:25,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 812 transitions. [2022-02-15 14:46:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:25,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:25,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:25,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:26,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:26,015 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:26,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:26,015 INFO L85 PathProgramCache]: Analyzing trace with hash 5421973, now seen corresponding path program 139 times [2022-02-15 14:46:26,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:26,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612314297] [2022-02-15 14:46:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:26,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:26,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:26,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612314297] [2022-02-15 14:46:26,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612314297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:26,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627844013] [2022-02-15 14:46:26,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:46:26,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:26,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:26,334 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:26,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-15 14:46:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:26,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:26,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:26,539 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 15 treesize of output 7 [2022-02-15 14:46:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:26,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:27,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:27,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:27,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627844013] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:27,459 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:27,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:27,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133389147] [2022-02-15 14:46:27,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:27,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:27,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:27,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:27,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:27,460 INFO L87 Difference]: Start difference. First operand 408 states and 812 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:28,874 INFO L93 Difference]: Finished difference Result 796 states and 1563 transitions. [2022-02-15 14:46:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:46:28,874 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:28,875 INFO L225 Difference]: With dead ends: 796 [2022-02-15 14:46:28,875 INFO L226 Difference]: Without dead ends: 787 [2022-02-15 14:46:28,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=412, Invalid=3620, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 14:46:28,876 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 127 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:28,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 438 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:46:28,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-02-15 14:46:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 410. [2022-02-15 14:46:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9926650366748166) internal successors, (815), 409 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 815 transitions. [2022-02-15 14:46:28,881 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 815 transitions. Word has length 30 [2022-02-15 14:46:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:28,881 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 815 transitions. [2022-02-15 14:46:28,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 815 transitions. [2022-02-15 14:46:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:28,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:28,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:28,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:29,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:29,083 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:29,083 INFO L85 PathProgramCache]: Analyzing trace with hash 887487697, now seen corresponding path program 140 times [2022-02-15 14:46:29,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:29,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517361033] [2022-02-15 14:46:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:29,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:29,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:29,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517361033] [2022-02-15 14:46:29,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517361033] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:29,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630694947] [2022-02-15 14:46:29,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:46:29,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:29,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:29,412 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:29,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-15 14:46:29,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:46:29,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:29,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:29,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:29,577 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 11 treesize of output 7 [2022-02-15 14:46:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:29,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:30,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:30,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:30,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630694947] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:30,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:30,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:30,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405527956] [2022-02-15 14:46:30,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:30,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:30,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:30,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:30,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:30,525 INFO L87 Difference]: Start difference. First operand 410 states and 815 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:31,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:31,965 INFO L93 Difference]: Finished difference Result 671 states and 1327 transitions. [2022-02-15 14:46:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:46:31,965 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:31,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:31,966 INFO L225 Difference]: With dead ends: 671 [2022-02-15 14:46:31,966 INFO L226 Difference]: Without dead ends: 648 [2022-02-15 14:46:31,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=436, Invalid=3596, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 14:46:31,966 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:31,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 303 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:46:31,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-02-15 14:46:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 400. [2022-02-15 14:46:31,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0050125313283207) internal successors, (800), 399 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 800 transitions. [2022-02-15 14:46:31,970 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 800 transitions. Word has length 30 [2022-02-15 14:46:31,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:31,970 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 800 transitions. [2022-02-15 14:46:31,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:31,971 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 800 transitions. [2022-02-15 14:46:31,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:31,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:31,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:31,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:32,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:32,172 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:32,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:32,172 INFO L85 PathProgramCache]: Analyzing trace with hash 9480047, now seen corresponding path program 141 times [2022-02-15 14:46:32,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:32,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137589300] [2022-02-15 14:46:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:32,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:32,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:32,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137589300] [2022-02-15 14:46:32,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137589300] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:32,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414045321] [2022-02-15 14:46:32,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:46:32,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:32,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:32,485 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:32,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-15 14:46:32,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:46:32,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:32,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:32,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:32,647 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 15 treesize of output 7 [2022-02-15 14:46:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:33,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:33,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:33,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:33,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414045321] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:33,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:33,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:33,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286513453] [2022-02-15 14:46:33,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:33,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:33,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:33,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:33,562 INFO L87 Difference]: Start difference. First operand 400 states and 800 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:34,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:34,963 INFO L93 Difference]: Finished difference Result 790 states and 1559 transitions. [2022-02-15 14:46:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:46:34,963 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:34,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:34,964 INFO L225 Difference]: With dead ends: 790 [2022-02-15 14:46:34,964 INFO L226 Difference]: Without dead ends: 757 [2022-02-15 14:46:34,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=419, Invalid=3487, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 14:46:34,965 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 136 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:34,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 489 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:46:34,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-02-15 14:46:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 396. [2022-02-15 14:46:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:34,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2022-02-15 14:46:34,970 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2022-02-15 14:46:34,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:34,970 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2022-02-15 14:46:34,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:34,970 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2022-02-15 14:46:34,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:34,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:34,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:34,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:35,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:35,171 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:35,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:35,171 INFO L85 PathProgramCache]: Analyzing trace with hash -159765419, now seen corresponding path program 142 times [2022-02-15 14:46:35,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:35,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024396300] [2022-02-15 14:46:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:35,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:35,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:35,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024396300] [2022-02-15 14:46:35,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024396300] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:35,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853460120] [2022-02-15 14:46:35,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:46:35,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:35,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:35,485 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:35,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-15 14:46:35,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:46:35,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:35,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:35,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:35,640 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 15 treesize of output 7 [2022-02-15 14:46:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:35,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:36,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:36,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:36,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853460120] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:36,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:36,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:36,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489753586] [2022-02-15 14:46:36,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:36,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:36,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:36,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1595, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:36,505 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:38,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:38,486 INFO L93 Difference]: Finished difference Result 841 states and 1655 transitions. [2022-02-15 14:46:38,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:46:38,486 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:38,487 INFO L225 Difference]: With dead ends: 841 [2022-02-15 14:46:38,488 INFO L226 Difference]: Without dead ends: 832 [2022-02-15 14:46:38,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1758 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=623, Invalid=4927, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 14:46:38,488 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 204 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:38,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 396 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:46:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-02-15 14:46:38,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 411. [2022-02-15 14:46:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0121951219512195) internal successors, (825), 410 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 825 transitions. [2022-02-15 14:46:38,498 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 825 transitions. Word has length 30 [2022-02-15 14:46:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:38,498 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 825 transitions. [2022-02-15 14:46:38,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 825 transitions. [2022-02-15 14:46:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:38,498 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:38,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:38,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:38,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:38,699 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:38,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:38,699 INFO L85 PathProgramCache]: Analyzing trace with hash 722300305, now seen corresponding path program 143 times [2022-02-15 14:46:38,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:38,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025707167] [2022-02-15 14:46:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:38,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:39,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:39,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025707167] [2022-02-15 14:46:39,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025707167] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:39,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020777015] [2022-02-15 14:46:39,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:46:39,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:39,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:39,004 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:39,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-15 14:46:39,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:46:39,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:39,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:46:39,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:39,161 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 11 treesize of output 7 [2022-02-15 14:46:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:39,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:39,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:39,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:40,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020777015] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:40,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:40,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:40,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166697857] [2022-02-15 14:46:40,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:40,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:40,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:40,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:40,116 INFO L87 Difference]: Start difference. First operand 411 states and 825 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:42,335 INFO L93 Difference]: Finished difference Result 692 states and 1369 transitions. [2022-02-15 14:46:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:46:42,336 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:42,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:42,337 INFO L225 Difference]: With dead ends: 692 [2022-02-15 14:46:42,337 INFO L226 Difference]: Without dead ends: 677 [2022-02-15 14:46:42,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=635, Invalid=4767, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 14:46:42,337 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 185 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:42,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 413 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:46:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-02-15 14:46:42,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 409. [2022-02-15 14:46:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0122549019607843) internal successors, (821), 408 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 821 transitions. [2022-02-15 14:46:42,342 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 821 transitions. Word has length 30 [2022-02-15 14:46:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:42,342 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 821 transitions. [2022-02-15 14:46:42,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 821 transitions. [2022-02-15 14:46:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:42,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:42,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:42,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:42,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-02-15 14:46:42,543 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:42,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2104000273, now seen corresponding path program 144 times [2022-02-15 14:46:42,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:42,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324252595] [2022-02-15 14:46:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:42,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:42,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:42,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324252595] [2022-02-15 14:46:42,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324252595] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:42,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682338723] [2022-02-15 14:46:42,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:46:42,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:42,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:42,852 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:42,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-15 14:46:42,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:46:42,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:42,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:42,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:43,009 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 11 treesize of output 7 [2022-02-15 14:46:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:43,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:43,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:43,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:46:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:43,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682338723] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:43,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:43,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-02-15 14:46:43,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083398283] [2022-02-15 14:46:43,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:43,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 14:46:43,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:43,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 14:46:43,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1721, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:46:43,999 INFO L87 Difference]: Start difference. First operand 409 states and 821 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:46,417 INFO L93 Difference]: Finished difference Result 934 states and 1827 transitions. [2022-02-15 14:46:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 14:46:46,417 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:46,418 INFO L225 Difference]: With dead ends: 934 [2022-02-15 14:46:46,418 INFO L226 Difference]: Without dead ends: 882 [2022-02-15 14:46:46,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2528 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=989, Invalid=6493, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 14:46:46,418 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 267 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:46,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 434 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:46:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-02-15 14:46:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 408. [2022-02-15 14:46:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9975429975429975) internal successors, (813), 407 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 813 transitions. [2022-02-15 14:46:46,424 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 813 transitions. Word has length 30 [2022-02-15 14:46:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:46,424 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 813 transitions. [2022-02-15 14:46:46,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 813 transitions. [2022-02-15 14:46:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:46,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:46,424 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:46,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:46,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:46,625 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:46,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:46,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1215381883, now seen corresponding path program 145 times [2022-02-15 14:46:46,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:46,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724631632] [2022-02-15 14:46:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:46,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:46,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:46,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724631632] [2022-02-15 14:46:46,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724631632] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:46,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124986567] [2022-02-15 14:46:46,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:46:46,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:46,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:46,943 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:46,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-15 14:46:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:46,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:46,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:47,107 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 15 treesize of output 7 [2022-02-15 14:46:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:47,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:47,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:47,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:48,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124986567] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:48,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:48,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:48,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861975103] [2022-02-15 14:46:48,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:48,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:48,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:48,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:48,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:48,083 INFO L87 Difference]: Start difference. First operand 408 states and 813 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:49,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:49,783 INFO L93 Difference]: Finished difference Result 791 states and 1552 transitions. [2022-02-15 14:46:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:46:49,783 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:49,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:49,784 INFO L225 Difference]: With dead ends: 791 [2022-02-15 14:46:49,784 INFO L226 Difference]: Without dead ends: 782 [2022-02-15 14:46:49,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=499, Invalid=4193, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:46:49,785 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:49,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 450 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:46:49,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-02-15 14:46:49,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 410. [2022-02-15 14:46:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9951100244498778) internal successors, (816), 409 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 816 transitions. [2022-02-15 14:46:49,790 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 816 transitions. Word has length 30 [2022-02-15 14:46:49,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:49,790 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 816 transitions. [2022-02-15 14:46:49,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:49,790 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 816 transitions. [2022-02-15 14:46:49,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:49,791 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:49,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:49,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-02-15 14:46:49,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-02-15 14:46:49,991 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:49,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash -333316159, now seen corresponding path program 146 times [2022-02-15 14:46:49,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:49,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450361271] [2022-02-15 14:46:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:49,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:50,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:50,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450361271] [2022-02-15 14:46:50,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450361271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:50,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156837606] [2022-02-15 14:46:50,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:46:50,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:50,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:50,314 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:50,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-15 14:46:50,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:46:50,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:50,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:50,483 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 11 treesize of output 7 [2022-02-15 14:46:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:50,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:51,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:51,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:51,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156837606] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:51,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:51,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:51,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819713950] [2022-02-15 14:46:51,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:51,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:51,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:51,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:51,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1614, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:51,500 INFO L87 Difference]: Start difference. First operand 410 states and 816 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:53,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:53,286 INFO L93 Difference]: Finished difference Result 653 states and 1283 transitions. [2022-02-15 14:46:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:46:53,286 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:53,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:53,287 INFO L225 Difference]: With dead ends: 653 [2022-02-15 14:46:53,287 INFO L226 Difference]: Without dead ends: 620 [2022-02-15 14:46:53,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=550, Invalid=4420, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 14:46:53,288 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 179 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:53,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 356 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1474 Invalid, 0 Unknown, 49 Unchecked, 0.6s Time] [2022-02-15 14:46:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-02-15 14:46:53,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 400. [2022-02-15 14:46:53,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.007518796992481) internal successors, (801), 399 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 801 transitions. [2022-02-15 14:46:53,292 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 801 transitions. Word has length 30 [2022-02-15 14:46:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:53,292 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 801 transitions. [2022-02-15 14:46:53,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 801 transitions. [2022-02-15 14:46:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:53,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:53,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:53,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:53,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-02-15 14:46:53,493 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:53,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1211323809, now seen corresponding path program 147 times [2022-02-15 14:46:53,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:53,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340785386] [2022-02-15 14:46:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:53,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:53,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:53,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340785386] [2022-02-15 14:46:53,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340785386] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:53,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005134162] [2022-02-15 14:46:53,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:46:53,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:53,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:53,802 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:53,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-15 14:46:53,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:46:53,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:53,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:53,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:53,964 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 15 treesize of output 7 [2022-02-15 14:46:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:54,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:54,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:54,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:54,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005134162] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:54,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:54,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:54,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880568569] [2022-02-15 14:46:54,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:54,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:54,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:54,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:54,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:54,851 INFO L87 Difference]: Start difference. First operand 400 states and 801 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:56,477 INFO L93 Difference]: Finished difference Result 788 states and 1553 transitions. [2022-02-15 14:46:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:46:56,478 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:56,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:56,479 INFO L225 Difference]: With dead ends: 788 [2022-02-15 14:46:56,479 INFO L226 Difference]: Without dead ends: 755 [2022-02-15 14:46:56,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=502, Invalid=4054, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:46:56,479 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 162 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:56,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 473 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:46:56,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-02-15 14:46:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 397. [2022-02-15 14:46:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.01010101010101) internal successors, (796), 396 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 796 transitions. [2022-02-15 14:46:56,484 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 796 transitions. Word has length 30 [2022-02-15 14:46:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:56,484 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 796 transitions. [2022-02-15 14:46:56,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 796 transitions. [2022-02-15 14:46:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:56,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:56,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:56,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:56,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-02-15 14:46:56,685 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:56,686 INFO L85 PathProgramCache]: Analyzing trace with hash -725186305, now seen corresponding path program 148 times [2022-02-15 14:46:56,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:56,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336691934] [2022-02-15 14:46:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:56,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:57,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:57,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336691934] [2022-02-15 14:46:57,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336691934] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:57,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390898135] [2022-02-15 14:46:57,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:46:57,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:57,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:57,030 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:57,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-15 14:46:57,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:46:57,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:57,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:57,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:57,190 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 15 treesize of output 7 [2022-02-15 14:46:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:57,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:57,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:57,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:46:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:58,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390898135] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:58,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:58,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:46:58,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074912742] [2022-02-15 14:46:58,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:58,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:46:58,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:58,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:46:58,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:46:58,079 INFO L87 Difference]: Start difference. First operand 397 states and 796 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:59,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:59,485 INFO L93 Difference]: Finished difference Result 784 states and 1539 transitions. [2022-02-15 14:46:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:46:59,485 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:46:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:59,486 INFO L225 Difference]: With dead ends: 784 [2022-02-15 14:46:59,486 INFO L226 Difference]: Without dead ends: 775 [2022-02-15 14:46:59,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=419, Invalid=3741, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:46:59,487 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 156 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:59,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 442 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:46:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-02-15 14:46:59,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 411. [2022-02-15 14:46:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-02-15 14:46:59,496 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-02-15 14:46:59,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:59,496 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-02-15 14:46:59,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-02-15 14:46:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:46:59,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:59,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:59,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:59,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:59,697 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:46:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:59,697 INFO L85 PathProgramCache]: Analyzing trace with hash 156879419, now seen corresponding path program 149 times [2022-02-15 14:46:59,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:59,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952302345] [2022-02-15 14:46:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:59,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:00,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:00,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952302345] [2022-02-15 14:47:00,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952302345] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:00,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276235797] [2022-02-15 14:47:00,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:47:00,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:00,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:00,011 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:00,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-15 14:47:00,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:47:00,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:00,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:00,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:00,175 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 11 treesize of output 7 [2022-02-15 14:47:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:00,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:00,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:00,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:01,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276235797] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:01,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:01,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:47:01,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795385117] [2022-02-15 14:47:01,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:01,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:47:01,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:01,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:47:01,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:47:01,100 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:02,651 INFO L93 Difference]: Finished difference Result 657 states and 1298 transitions. [2022-02-15 14:47:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:47:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:02,652 INFO L225 Difference]: With dead ends: 657 [2022-02-15 14:47:02,652 INFO L226 Difference]: Without dead ends: 642 [2022-02-15 14:47:02,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=445, Invalid=3715, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:47:02,652 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 157 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:02,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 416 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1777 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:47:02,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-02-15 14:47:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 409. [2022-02-15 14:47:02,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2022-02-15 14:47:02,657 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2022-02-15 14:47:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:02,657 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2022-02-15 14:47:02,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2022-02-15 14:47:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:02,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:02,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:02,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:02,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:02,858 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:02,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:02,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1625546137, now seen corresponding path program 150 times [2022-02-15 14:47:02,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:02,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563958506] [2022-02-15 14:47:02,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:02,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:03,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:03,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563958506] [2022-02-15 14:47:03,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563958506] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:03,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189579990] [2022-02-15 14:47:03,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:47:03,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:03,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:03,172 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:03,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-15 14:47:03,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:47:03,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:03,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:03,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:03,332 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 11 treesize of output 7 [2022-02-15 14:47:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:03,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:04,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:04,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:04,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189579990] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:04,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:04,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:47:04,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761552434] [2022-02-15 14:47:04,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:04,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:47:04,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:04,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:47:04,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:47:04,256 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:05,193 INFO L93 Difference]: Finished difference Result 642 states and 1267 transitions. [2022-02-15 14:47:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 14:47:05,193 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:05,194 INFO L225 Difference]: With dead ends: 642 [2022-02-15 14:47:05,194 INFO L226 Difference]: Without dead ends: 603 [2022-02-15 14:47:05,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=294, Invalid=2256, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 14:47:05,194 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 107 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:05,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 594 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1521 Invalid, 0 Unknown, 31 Unchecked, 0.6s Time] [2022-02-15 14:47:05,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-15 14:47:05,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 401. [2022-02-15 14:47:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.005) internal successors, (802), 400 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 802 transitions. [2022-02-15 14:47:05,199 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 802 transitions. Word has length 30 [2022-02-15 14:47:05,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:05,199 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 802 transitions. [2022-02-15 14:47:05,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 802 transitions. [2022-02-15 14:47:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:05,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:05,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:05,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:05,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:05,400 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:05,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:05,400 INFO L85 PathProgramCache]: Analyzing trace with hash -721128231, now seen corresponding path program 151 times [2022-02-15 14:47:05,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:05,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113492408] [2022-02-15 14:47:05,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:05,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:05,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:05,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113492408] [2022-02-15 14:47:05,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113492408] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:05,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375041415] [2022-02-15 14:47:05,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:47:05,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:05,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:05,795 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:05,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-15 14:47:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:05,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:05,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:05,990 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 11 treesize of output 7 [2022-02-15 14:47:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:06,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:06,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:06,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:06,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375041415] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:06,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:06,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:47:06,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195242192] [2022-02-15 14:47:06,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:06,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:47:06,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:06,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:47:06,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:47:06,893 INFO L87 Difference]: Start difference. First operand 401 states and 802 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:07,894 INFO L93 Difference]: Finished difference Result 766 states and 1510 transitions. [2022-02-15 14:47:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:47:07,894 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:07,895 INFO L225 Difference]: With dead ends: 766 [2022-02-15 14:47:07,895 INFO L226 Difference]: Without dead ends: 749 [2022-02-15 14:47:07,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=382, Invalid=3158, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 14:47:07,896 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 146 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:07,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 351 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 989 Invalid, 0 Unknown, 144 Unchecked, 0.4s Time] [2022-02-15 14:47:07,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-02-15 14:47:07,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 415. [2022-02-15 14:47:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.9855072463768115) internal successors, (822), 414 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 822 transitions. [2022-02-15 14:47:07,901 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 822 transitions. Word has length 30 [2022-02-15 14:47:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:07,901 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 822 transitions. [2022-02-15 14:47:07,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:07,901 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 822 transitions. [2022-02-15 14:47:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:07,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:07,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:07,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:08,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:08,102 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:08,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:08,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1147893365, now seen corresponding path program 152 times [2022-02-15 14:47:08,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:08,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194383776] [2022-02-15 14:47:08,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:08,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:08,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:08,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194383776] [2022-02-15 14:47:08,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194383776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:08,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61004909] [2022-02-15 14:47:08,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:47:08,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:08,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:08,415 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:08,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-15 14:47:08,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:47:08,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:08,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:08,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:08,578 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 11 treesize of output 7 [2022-02-15 14:47:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:08,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:09,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:09,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:09,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61004909] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:09,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:09,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:47:09,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555793803] [2022-02-15 14:47:09,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:09,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:47:09,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:09,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:47:09,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:47:09,477 INFO L87 Difference]: Start difference. First operand 415 states and 822 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:10,533 INFO L93 Difference]: Finished difference Result 754 states and 1486 transitions. [2022-02-15 14:47:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 14:47:10,534 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:10,534 INFO L225 Difference]: With dead ends: 754 [2022-02-15 14:47:10,534 INFO L226 Difference]: Without dead ends: 733 [2022-02-15 14:47:10,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=400, Invalid=3382, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:47:10,535 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 136 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:10,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 335 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 983 Invalid, 0 Unknown, 212 Unchecked, 0.4s Time] [2022-02-15 14:47:10,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-02-15 14:47:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 399. [2022-02-15 14:47:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0050251256281406) internal successors, (798), 398 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 798 transitions. [2022-02-15 14:47:10,540 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 798 transitions. Word has length 30 [2022-02-15 14:47:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:10,540 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 798 transitions. [2022-02-15 14:47:10,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 798 transitions. [2022-02-15 14:47:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:10,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:10,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:10,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-02-15 14:47:10,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:10,741 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:10,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1234330325, now seen corresponding path program 153 times [2022-02-15 14:47:10,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:10,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450385037] [2022-02-15 14:47:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:10,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:11,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:11,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450385037] [2022-02-15 14:47:11,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450385037] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:11,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441416902] [2022-02-15 14:47:11,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:47:11,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:11,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:11,067 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:11,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-15 14:47:11,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:47:11,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:11,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:11,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:11,232 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 15 treesize of output 7 [2022-02-15 14:47:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:11,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:12,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:12,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:12,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441416902] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:12,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:12,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-02-15 14:47:12,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382160355] [2022-02-15 14:47:12,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:12,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 14:47:12,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:12,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 14:47:12,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:47:12,257 INFO L87 Difference]: Start difference. First operand 399 states and 798 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:13,511 INFO L93 Difference]: Finished difference Result 752 states and 1486 transitions. [2022-02-15 14:47:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:47:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:13,512 INFO L225 Difference]: With dead ends: 752 [2022-02-15 14:47:13,512 INFO L226 Difference]: Without dead ends: 716 [2022-02-15 14:47:13,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=425, Invalid=3865, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 14:47:13,513 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 125 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:13,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 514 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1394 Invalid, 0 Unknown, 309 Unchecked, 0.5s Time] [2022-02-15 14:47:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-02-15 14:47:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 394. [2022-02-15 14:47:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2022-02-15 14:47:13,518 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2022-02-15 14:47:13,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:13,518 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2022-02-15 14:47:13,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:13,518 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2022-02-15 14:47:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:13,518 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:13,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:13,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:13,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:13,719 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:13,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1602804433, now seen corresponding path program 154 times [2022-02-15 14:47:13,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:13,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947952977] [2022-02-15 14:47:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:13,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:14,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:14,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947952977] [2022-02-15 14:47:14,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947952977] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:14,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411657908] [2022-02-15 14:47:14,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:47:14,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:14,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:14,039 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:14,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-15 14:47:14,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:47:14,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:14,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:14,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:14,229 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 15 treesize of output 7 [2022-02-15 14:47:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:14,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:14,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:14,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:15,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411657908] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:15,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:15,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:47:15,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173639368] [2022-02-15 14:47:15,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:15,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:47:15,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:47:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:47:15,157 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:16,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:16,796 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2022-02-15 14:47:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:47:16,796 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:16,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:16,797 INFO L225 Difference]: With dead ends: 811 [2022-02-15 14:47:16,797 INFO L226 Difference]: Without dead ends: 802 [2022-02-15 14:47:16,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=450, Invalid=4106, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:47:16,797 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:16,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 489 Invalid, 2153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:47:16,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-02-15 14:47:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 415. [2022-02-15 14:47:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2022-02-15 14:47:16,802 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2022-02-15 14:47:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:16,803 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2022-02-15 14:47:16,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2022-02-15 14:47:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:16,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:16,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:16,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-02-15 14:47:17,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-02-15 14:47:17,004 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash -720738709, now seen corresponding path program 155 times [2022-02-15 14:47:17,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:17,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705231631] [2022-02-15 14:47:17,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:17,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:17,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:17,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705231631] [2022-02-15 14:47:17,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705231631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:17,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491114509] [2022-02-15 14:47:17,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:47:17,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:17,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:17,328 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:17,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-15 14:47:17,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:47:17,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:17,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:47:17,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:17,516 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 11 treesize of output 7 [2022-02-15 14:47:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:17,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:18,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:18,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:18,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491114509] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:18,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:18,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:47:18,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53941185] [2022-02-15 14:47:18,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:18,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:47:18,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:18,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:47:18,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:47:18,477 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:20,176 INFO L93 Difference]: Finished difference Result 695 states and 1378 transitions. [2022-02-15 14:47:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:47:20,176 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:20,177 INFO L225 Difference]: With dead ends: 695 [2022-02-15 14:47:20,177 INFO L226 Difference]: Without dead ends: 680 [2022-02-15 14:47:20,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=481, Invalid=4075, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:47:20,177 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 149 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:20,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 386 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:47:20,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-02-15 14:47:20,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 413. [2022-02-15 14:47:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2022-02-15 14:47:20,185 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2022-02-15 14:47:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:20,185 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2022-02-15 14:47:20,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2022-02-15 14:47:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:20,186 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:20,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:20,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-02-15 14:47:20,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-02-15 14:47:20,387 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:20,387 INFO L85 PathProgramCache]: Analyzing trace with hash 747928009, now seen corresponding path program 156 times [2022-02-15 14:47:20,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:20,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99806066] [2022-02-15 14:47:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:20,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:20,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:20,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99806066] [2022-02-15 14:47:20,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99806066] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:20,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932880047] [2022-02-15 14:47:20,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:47:20,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:20,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:20,713 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:20,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-15 14:47:20,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:47:20,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:20,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:47:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:20,899 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 11 treesize of output 7 [2022-02-15 14:47:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:21,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:21,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:21,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:21,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932880047] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:21,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:21,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:47:21,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141588852] [2022-02-15 14:47:21,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:21,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:47:21,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:21,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:47:21,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:47:21,720 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:23,319 INFO L93 Difference]: Finished difference Result 825 states and 1617 transitions. [2022-02-15 14:47:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:47:23,319 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:23,320 INFO L225 Difference]: With dead ends: 825 [2022-02-15 14:47:23,320 INFO L226 Difference]: Without dead ends: 788 [2022-02-15 14:47:23,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=463, Invalid=3959, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 14:47:23,321 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 170 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:23,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 464 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:47:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-15 14:47:23,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 411. [2022-02-15 14:47:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-02-15 14:47:23,326 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-02-15 14:47:23,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:23,326 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-02-15 14:47:23,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-02-15 14:47:23,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:23,326 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:23,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:23,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-02-15 14:47:23,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-02-15 14:47:23,527 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:23,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:23,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1669630149, now seen corresponding path program 157 times [2022-02-15 14:47:23,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:23,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488969680] [2022-02-15 14:47:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:23,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:23,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:23,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488969680] [2022-02-15 14:47:23,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488969680] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:23,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782939846] [2022-02-15 14:47:23,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:47:23,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:23,842 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:23,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-15 14:47:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:23,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:24,028 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 15 treesize of output 7 [2022-02-15 14:47:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:24,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:24,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:24,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:24,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782939846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:24,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:24,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:47:24,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041260393] [2022-02-15 14:47:24,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:24,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:47:24,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:47:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:47:24,879 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:26,316 INFO L93 Difference]: Finished difference Result 804 states and 1585 transitions. [2022-02-15 14:47:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:47:26,317 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:26,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:26,317 INFO L225 Difference]: With dead ends: 804 [2022-02-15 14:47:26,317 INFO L226 Difference]: Without dead ends: 761 [2022-02-15 14:47:26,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=442, Invalid=3848, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 14:47:26,318 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:26,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 451 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:47:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-15 14:47:26,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 399. [2022-02-15 14:47:26,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.007537688442211) internal successors, (799), 398 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 799 transitions. [2022-02-15 14:47:26,323 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 799 transitions. Word has length 30 [2022-02-15 14:47:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:26,323 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 799 transitions. [2022-02-15 14:47:26,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 799 transitions. [2022-02-15 14:47:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:26,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:26,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:26,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:26,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-02-15 14:47:26,524 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:26,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:26,524 INFO L85 PathProgramCache]: Analyzing trace with hash 394604629, now seen corresponding path program 158 times [2022-02-15 14:47:26,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:26,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944887410] [2022-02-15 14:47:26,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:26,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:26,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:26,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944887410] [2022-02-15 14:47:26,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944887410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:26,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490098402] [2022-02-15 14:47:26,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:47:26,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:26,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:26,836 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:26,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-15 14:47:26,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:47:26,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:26,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:26,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:27,026 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 11 treesize of output 7 [2022-02-15 14:47:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:27,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:27,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:27,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:47:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:28,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490098402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:28,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:28,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-02-15 14:47:28,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891448855] [2022-02-15 14:47:28,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:28,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 14:47:28,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:28,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 14:47:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:47:28,019 INFO L87 Difference]: Start difference. First operand 399 states and 799 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:30,485 INFO L93 Difference]: Finished difference Result 969 states and 1901 transitions. [2022-02-15 14:47:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 14:47:30,486 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:30,487 INFO L225 Difference]: With dead ends: 969 [2022-02-15 14:47:30,487 INFO L226 Difference]: Without dead ends: 960 [2022-02-15 14:47:30,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=882, Invalid=6600, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 14:47:30,487 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 223 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:30,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 472 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 14:47:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-02-15 14:47:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 413. [2022-02-15 14:47:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0097087378640777) internal successors, (828), 412 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 828 transitions. [2022-02-15 14:47:30,493 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 828 transitions. Word has length 30 [2022-02-15 14:47:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:30,493 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 828 transitions. [2022-02-15 14:47:30,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 828 transitions. [2022-02-15 14:47:30,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:30,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:30,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:30,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:30,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:30,694 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1276670353, now seen corresponding path program 159 times [2022-02-15 14:47:30,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:30,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402432337] [2022-02-15 14:47:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:30,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:31,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:31,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402432337] [2022-02-15 14:47:31,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402432337] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:31,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51843743] [2022-02-15 14:47:31,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:47:31,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:31,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:31,016 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:31,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-15 14:47:31,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:47:31,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:31,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:31,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:31,211 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 11 treesize of output 7 [2022-02-15 14:47:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:31,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:32,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:32,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:47:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:32,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51843743] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:32,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:32,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-02-15 14:47:32,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577239245] [2022-02-15 14:47:32,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:32,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 14:47:32,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:32,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 14:47:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1907, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:47:32,233 INFO L87 Difference]: Start difference. First operand 413 states and 828 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:34,848 INFO L93 Difference]: Finished difference Result 869 states and 1715 transitions. [2022-02-15 14:47:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 14:47:34,849 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:34,850 INFO L225 Difference]: With dead ends: 869 [2022-02-15 14:47:34,850 INFO L226 Difference]: Without dead ends: 854 [2022-02-15 14:47:34,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=916, Invalid=6394, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 14:47:34,850 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 263 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:34,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 409 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2378 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:47:34,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-02-15 14:47:34,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 411. [2022-02-15 14:47:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2022-02-15 14:47:34,855 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2022-02-15 14:47:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:34,856 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2022-02-15 14:47:34,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:34,856 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2022-02-15 14:47:34,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:34,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:34,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:34,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:35,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:35,057 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:35,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1549630225, now seen corresponding path program 160 times [2022-02-15 14:47:35,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:35,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473008060] [2022-02-15 14:47:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:35,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:35,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:35,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473008060] [2022-02-15 14:47:35,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473008060] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:35,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311191597] [2022-02-15 14:47:35,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:47:35,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:35,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:35,374 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:35,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-15 14:47:35,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:47:35,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:35,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:35,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:35,558 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 15 treesize of output 7 [2022-02-15 14:47:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:35,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:36,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:36,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:36,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311191597] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:36,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:36,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:47:36,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695809269] [2022-02-15 14:47:36,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:36,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:47:36,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:36,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:47:36,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:47:36,483 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:38,463 INFO L93 Difference]: Finished difference Result 892 states and 1752 transitions. [2022-02-15 14:47:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 14:47:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:38,465 INFO L225 Difference]: With dead ends: 892 [2022-02-15 14:47:38,465 INFO L226 Difference]: Without dead ends: 831 [2022-02-15 14:47:38,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=590, Invalid=4812, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 14:47:38,465 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 203 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:38,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 446 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1808 Invalid, 0 Unknown, 138 Unchecked, 0.7s Time] [2022-02-15 14:47:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-02-15 14:47:38,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 410. [2022-02-15 14:47:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9951100244498778) internal successors, (816), 409 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 816 transitions. [2022-02-15 14:47:38,470 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 816 transitions. Word has length 30 [2022-02-15 14:47:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:38,471 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 816 transitions. [2022-02-15 14:47:38,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 816 transitions. [2022-02-15 14:47:38,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:38,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:38,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:38,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:38,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:38,672 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash -661011835, now seen corresponding path program 161 times [2022-02-15 14:47:38,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:38,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782997994] [2022-02-15 14:47:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:38,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:38,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:38,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782997994] [2022-02-15 14:47:38,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782997994] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:38,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196610823] [2022-02-15 14:47:38,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:47:38,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:38,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:38,993 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:38,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-15 14:47:39,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:47:39,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:39,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:39,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:39,191 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 15 treesize of output 7 [2022-02-15 14:47:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:39,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:39,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:39,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:40,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196610823] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:40,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:40,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:47:40,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277997537] [2022-02-15 14:47:40,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:40,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:47:40,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:40,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:47:40,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:47:40,069 INFO L87 Difference]: Start difference. First operand 410 states and 816 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:41,352 INFO L93 Difference]: Finished difference Result 799 states and 1569 transitions. [2022-02-15 14:47:41,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:47:41,352 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:41,353 INFO L225 Difference]: With dead ends: 799 [2022-02-15 14:47:41,353 INFO L226 Difference]: Without dead ends: 790 [2022-02-15 14:47:41,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=397, Invalid=3635, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 14:47:41,354 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 131 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:41,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 368 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:47:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-02-15 14:47:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 412. [2022-02-15 14:47:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.9927007299270072) internal successors, (819), 411 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 819 transitions. [2022-02-15 14:47:41,361 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 819 transitions. Word has length 30 [2022-02-15 14:47:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:41,361 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 819 transitions. [2022-02-15 14:47:41,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 819 transitions. [2022-02-15 14:47:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:41,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:41,362 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:41,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:41,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:41,583 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash 221053889, now seen corresponding path program 162 times [2022-02-15 14:47:41,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:41,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378787538] [2022-02-15 14:47:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:41,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:41,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:41,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378787538] [2022-02-15 14:47:41,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378787538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:41,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545913321] [2022-02-15 14:47:41,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:47:41,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:41,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:41,913 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:41,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-15 14:47:41,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:47:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:41,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:42,107 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 11 treesize of output 7 [2022-02-15 14:47:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:42,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:42,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:42,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:43,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545913321] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:43,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:43,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:47:43,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667123979] [2022-02-15 14:47:43,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:43,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:47:43,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:43,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:47:43,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:47:43,119 INFO L87 Difference]: Start difference. First operand 412 states and 819 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:44,612 INFO L93 Difference]: Finished difference Result 671 states and 1327 transitions. [2022-02-15 14:47:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:47:44,612 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:44,613 INFO L225 Difference]: With dead ends: 671 [2022-02-15 14:47:44,613 INFO L226 Difference]: Without dead ends: 648 [2022-02-15 14:47:44,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=421, Invalid=3611, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 14:47:44,614 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 146 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:44,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 389 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:47:44,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-02-15 14:47:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 402. [2022-02-15 14:47:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0049875311720697) internal successors, (804), 401 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 804 transitions. [2022-02-15 14:47:44,620 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 804 transitions. Word has length 30 [2022-02-15 14:47:44,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:44,620 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 804 transitions. [2022-02-15 14:47:44,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 804 transitions. [2022-02-15 14:47:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:44,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:44,621 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:44,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:44,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:44,827 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:44,828 INFO L85 PathProgramCache]: Analyzing trace with hash -656953761, now seen corresponding path program 163 times [2022-02-15 14:47:44,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:44,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783804134] [2022-02-15 14:47:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:44,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:45,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:45,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783804134] [2022-02-15 14:47:45,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783804134] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:45,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974917006] [2022-02-15 14:47:45,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:47:45,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:45,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:45,141 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:45,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-15 14:47:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:45,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:45,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:45,331 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 11 treesize of output 7 [2022-02-15 14:47:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:45,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:46,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:46,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:46,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974917006] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:46,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:46,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:47:46,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749283037] [2022-02-15 14:47:46,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:46,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:47:46,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:46,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:47:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:47:46,243 INFO L87 Difference]: Start difference. First operand 402 states and 804 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:47,428 INFO L93 Difference]: Finished difference Result 793 states and 1565 transitions. [2022-02-15 14:47:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:47:47,428 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:47,429 INFO L225 Difference]: With dead ends: 793 [2022-02-15 14:47:47,429 INFO L226 Difference]: Without dead ends: 776 [2022-02-15 14:47:47,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=395, Invalid=3387, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:47:47,429 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 138 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:47,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 388 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1237 Invalid, 0 Unknown, 147 Unchecked, 0.5s Time] [2022-02-15 14:47:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-02-15 14:47:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 416. [2022-02-15 14:47:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9855421686746988) internal successors, (824), 415 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 824 transitions. [2022-02-15 14:47:47,435 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 824 transitions. Word has length 30 [2022-02-15 14:47:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:47,435 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 824 transitions. [2022-02-15 14:47:47,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 824 transitions. [2022-02-15 14:47:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:47,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:47,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:47,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-02-15 14:47:47,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:47,636 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1212067835, now seen corresponding path program 164 times [2022-02-15 14:47:47,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:47,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932607024] [2022-02-15 14:47:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:47,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:47,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:47,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932607024] [2022-02-15 14:47:47,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932607024] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:47,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586853296] [2022-02-15 14:47:47,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:47:47,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:47,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:47,949 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:47,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-15 14:47:47,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:47:47,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:47,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:47,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:48,139 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 15 treesize of output 7 [2022-02-15 14:47:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:48,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:48,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:48,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:49,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586853296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:49,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:49,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:47:49,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588196795] [2022-02-15 14:47:49,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:49,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:47:49,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:49,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:47:49,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:47:49,033 INFO L87 Difference]: Start difference. First operand 416 states and 824 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:50,191 INFO L93 Difference]: Finished difference Result 739 states and 1454 transitions. [2022-02-15 14:47:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:47:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:50,192 INFO L225 Difference]: With dead ends: 739 [2022-02-15 14:47:50,192 INFO L226 Difference]: Without dead ends: 718 [2022-02-15 14:47:50,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=359, Invalid=3181, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 14:47:50,193 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 100 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:50,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 531 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1500 Invalid, 0 Unknown, 119 Unchecked, 0.6s Time] [2022-02-15 14:47:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-02-15 14:47:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 398. [2022-02-15 14:47:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.0075566750629723) internal successors, (797), 397 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 797 transitions. [2022-02-15 14:47:50,198 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 797 transitions. Word has length 30 [2022-02-15 14:47:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:50,198 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 797 transitions. [2022-02-15 14:47:50,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 797 transitions. [2022-02-15 14:47:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:50,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:50,198 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:50,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-02-15 14:47:50,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2022-02-15 14:47:50,399 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:50,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:50,399 INFO L85 PathProgramCache]: Analyzing trace with hash -826199227, now seen corresponding path program 165 times [2022-02-15 14:47:50,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:50,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785498905] [2022-02-15 14:47:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:50,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:50,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:50,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785498905] [2022-02-15 14:47:50,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785498905] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:50,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765751147] [2022-02-15 14:47:50,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:47:50,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:50,714 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:50,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-15 14:47:50,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:47:50,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:50,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:50,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:50,908 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 11 treesize of output 7 [2022-02-15 14:47:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:51,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:51,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:51,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:47:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:51,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765751147] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:51,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:51,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-02-15 14:47:51,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443360007] [2022-02-15 14:47:51,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:51,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 14:47:51,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:51,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 14:47:51,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:47:51,883 INFO L87 Difference]: Start difference. First operand 398 states and 797 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:54,293 INFO L93 Difference]: Finished difference Result 925 states and 1817 transitions. [2022-02-15 14:47:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 14:47:54,293 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:54,295 INFO L225 Difference]: With dead ends: 925 [2022-02-15 14:47:54,295 INFO L226 Difference]: Without dead ends: 916 [2022-02-15 14:47:54,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=988, Invalid=7022, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 14:47:54,295 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 271 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:54,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 419 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2222 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:47:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-02-15 14:47:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 413. [2022-02-15 14:47:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.012135922330097) internal successors, (829), 412 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 829 transitions. [2022-02-15 14:47:54,301 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 829 transitions. Word has length 30 [2022-02-15 14:47:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:54,301 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 829 transitions. [2022-02-15 14:47:54,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 829 transitions. [2022-02-15 14:47:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:54,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:54,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:54,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:54,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-02-15 14:47:54,502 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:54,502 INFO L85 PathProgramCache]: Analyzing trace with hash 55866497, now seen corresponding path program 166 times [2022-02-15 14:47:54,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:54,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15863401] [2022-02-15 14:47:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:54,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:54,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:54,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15863401] [2022-02-15 14:47:54,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15863401] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:54,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556518627] [2022-02-15 14:47:54,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:47:54,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:54,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:54,817 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:54,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-15 14:47:54,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:47:54,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:55,003 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 15 treesize of output 7 [2022-02-15 14:47:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:55,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:55,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:55,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:47:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:55,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556518627] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:55,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:55,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:47:55,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238291326] [2022-02-15 14:47:55,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:55,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:47:55,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:55,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:47:55,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:47:55,970 INFO L87 Difference]: Start difference. First operand 413 states and 829 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:58,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:47:58,317 INFO L93 Difference]: Finished difference Result 706 states and 1397 transitions. [2022-02-15 14:47:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 14:47:58,317 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:47:58,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:47:58,318 INFO L225 Difference]: With dead ends: 706 [2022-02-15 14:47:58,318 INFO L226 Difference]: Without dead ends: 691 [2022-02-15 14:47:58,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=654, Invalid=5046, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 14:47:58,318 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 208 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:47:58,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 413 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:47:58,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-02-15 14:47:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 411. [2022-02-15 14:47:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0121951219512195) internal successors, (825), 410 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 825 transitions. [2022-02-15 14:47:58,325 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 825 transitions. Word has length 30 [2022-02-15 14:47:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:47:58,325 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 825 transitions. [2022-02-15 14:47:58,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:47:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 825 transitions. [2022-02-15 14:47:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:47:58,326 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:47:58,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:47:58,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-02-15 14:47:58,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-02-15 14:47:58,539 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:47:58,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:47:58,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1524533215, now seen corresponding path program 167 times [2022-02-15 14:47:58,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:47:58,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965759488] [2022-02-15 14:47:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:47:58,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:47:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:47:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:58,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:47:58,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965759488] [2022-02-15 14:47:58,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965759488] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:47:58,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715286454] [2022-02-15 14:47:58,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:47:58,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:47:58,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:47:58,849 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:47:58,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-15 14:47:58,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:47:58,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:47:58,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:47:58,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:47:59,033 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 11 treesize of output 7 [2022-02-15 14:47:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:59,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:47:59,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:47:59,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:47:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:47:59,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715286454] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:47:59,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:47:59,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-02-15 14:47:59,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649968602] [2022-02-15 14:47:59,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:47:59,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 14:47:59,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:47:59,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 14:47:59,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1729, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:47:59,968 INFO L87 Difference]: Start difference. First operand 411 states and 825 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:02,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:02,414 INFO L93 Difference]: Finished difference Result 945 states and 1850 transitions. [2022-02-15 14:48:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 14:48:02,415 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:02,416 INFO L225 Difference]: With dead ends: 945 [2022-02-15 14:48:02,416 INFO L226 Difference]: Without dead ends: 893 [2022-02-15 14:48:02,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1018, Invalid=6814, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 14:48:02,417 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 288 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:02,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 458 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:48:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-02-15 14:48:02,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 410. [2022-02-15 14:48:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9975550122249388) internal successors, (817), 409 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 817 transitions. [2022-02-15 14:48:02,422 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 817 transitions. Word has length 30 [2022-02-15 14:48:02,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:02,422 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 817 transitions. [2022-02-15 14:48:02,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 817 transitions. [2022-02-15 14:48:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:02,423 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:02,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:02,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:02,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:02,623 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:02,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1881815691, now seen corresponding path program 168 times [2022-02-15 14:48:02,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:02,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437938924] [2022-02-15 14:48:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:02,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:02,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:02,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437938924] [2022-02-15 14:48:02,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437938924] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:02,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115863120] [2022-02-15 14:48:02,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:48:02,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:02,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:02,938 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:02,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-15 14:48:02,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:48:02,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:02,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:02,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:03,127 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 11 treesize of output 7 [2022-02-15 14:48:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:03,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:03,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:03,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:04,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115863120] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:04,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:04,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:48:04,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359180112] [2022-02-15 14:48:04,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:04,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:48:04,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:48:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:48:04,060 INFO L87 Difference]: Start difference. First operand 410 states and 817 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:05,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:05,537 INFO L93 Difference]: Finished difference Result 798 states and 1567 transitions. [2022-02-15 14:48:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 14:48:05,538 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:05,538 INFO L225 Difference]: With dead ends: 798 [2022-02-15 14:48:05,538 INFO L226 Difference]: Without dead ends: 789 [2022-02-15 14:48:05,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=484, Invalid=4208, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:48:05,539 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 190 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:05,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 291 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:48:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-02-15 14:48:05,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 412. [2022-02-15 14:48:05,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.9951338199513382) internal successors, (820), 411 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 820 transitions. [2022-02-15 14:48:05,544 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 820 transitions. Word has length 30 [2022-02-15 14:48:05,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:05,544 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 820 transitions. [2022-02-15 14:48:05,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 820 transitions. [2022-02-15 14:48:05,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:05,545 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:05,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:05,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-02-15 14:48:05,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:05,745 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:05,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:05,745 INFO L85 PathProgramCache]: Analyzing trace with hash -999749967, now seen corresponding path program 169 times [2022-02-15 14:48:05,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:05,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866959920] [2022-02-15 14:48:05,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:05,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:06,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:06,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866959920] [2022-02-15 14:48:06,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866959920] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:06,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343070227] [2022-02-15 14:48:06,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:48:06,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:06,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:06,063 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:06,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-15 14:48:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:06,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:06,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:06,252 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 15 treesize of output 7 [2022-02-15 14:48:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:06,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:06,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:06,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:07,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343070227] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:07,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:07,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:48:07,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317960685] [2022-02-15 14:48:07,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:07,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:48:07,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:07,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:48:07,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:48:07,149 INFO L87 Difference]: Start difference. First operand 412 states and 820 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:08,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:08,847 INFO L93 Difference]: Finished difference Result 653 states and 1290 transitions. [2022-02-15 14:48:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:48:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:08,848 INFO L225 Difference]: With dead ends: 653 [2022-02-15 14:48:08,848 INFO L226 Difference]: Without dead ends: 630 [2022-02-15 14:48:08,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=516, Invalid=4176, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:48:08,849 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 185 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:08,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 323 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:48:08,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-02-15 14:48:08,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 402. [2022-02-15 14:48:08,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2022-02-15 14:48:08,853 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2022-02-15 14:48:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:08,853 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2022-02-15 14:48:08,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2022-02-15 14:48:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:08,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:08,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:08,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-02-15 14:48:09,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:09,054 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:09,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:09,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1877757617, now seen corresponding path program 170 times [2022-02-15 14:48:09,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:09,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428028842] [2022-02-15 14:48:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:09,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:09,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:09,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428028842] [2022-02-15 14:48:09,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428028842] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:09,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519444654] [2022-02-15 14:48:09,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:48:09,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:09,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:09,405 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:09,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-15 14:48:09,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:48:09,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:09,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:09,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:09,595 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 15 treesize of output 7 [2022-02-15 14:48:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:09,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:10,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:10,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:10,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519444654] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:10,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:10,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:48:10,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204492897] [2022-02-15 14:48:10,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:10,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:48:10,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:10,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:48:10,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:48:10,490 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:12,047 INFO L93 Difference]: Finished difference Result 795 states and 1568 transitions. [2022-02-15 14:48:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:48:12,047 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:12,048 INFO L225 Difference]: With dead ends: 795 [2022-02-15 14:48:12,048 INFO L226 Difference]: Without dead ends: 762 [2022-02-15 14:48:12,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=487, Invalid=4069, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:48:12,049 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 163 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:12,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 418 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:48:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-02-15 14:48:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 399. [2022-02-15 14:48:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0100502512562812) internal successors, (800), 398 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 800 transitions. [2022-02-15 14:48:12,055 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 800 transitions. Word has length 30 [2022-02-15 14:48:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:12,056 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 800 transitions. [2022-02-15 14:48:12,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 800 transitions. [2022-02-15 14:48:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:12,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:12,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:12,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:12,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:12,279 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:12,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1391620113, now seen corresponding path program 171 times [2022-02-15 14:48:12,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:12,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553146776] [2022-02-15 14:48:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:12,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:12,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:12,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553146776] [2022-02-15 14:48:12,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553146776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:12,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72504430] [2022-02-15 14:48:12,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:48:12,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:12,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:12,629 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:12,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-15 14:48:12,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:48:12,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:12,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:12,866 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 11 treesize of output 7 [2022-02-15 14:48:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:13,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:13,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:13,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:13,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72504430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:13,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:13,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:48:13,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91049302] [2022-02-15 14:48:13,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:13,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:48:13,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:48:13,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:48:13,819 INFO L87 Difference]: Start difference. First operand 399 states and 800 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:15,193 INFO L93 Difference]: Finished difference Result 794 states and 1560 transitions. [2022-02-15 14:48:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:48:15,194 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:15,195 INFO L225 Difference]: With dead ends: 794 [2022-02-15 14:48:15,195 INFO L226 Difference]: Without dead ends: 785 [2022-02-15 14:48:15,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=404, Invalid=3756, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:48:15,195 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 141 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:15,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 438 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:48:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-02-15 14:48:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 413. [2022-02-15 14:48:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2022-02-15 14:48:15,200 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2022-02-15 14:48:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:15,201 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2022-02-15 14:48:15,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2022-02-15 14:48:15,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:15,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:15,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:15,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:15,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-02-15 14:48:15,402 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash -509554389, now seen corresponding path program 172 times [2022-02-15 14:48:15,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:15,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876059785] [2022-02-15 14:48:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:15,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:15,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:15,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876059785] [2022-02-15 14:48:15,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876059785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:15,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624650345] [2022-02-15 14:48:15,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:48:15,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:15,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:15,725 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:15,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-15 14:48:15,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:48:15,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:15,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:15,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:15,919 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 15 treesize of output 7 [2022-02-15 14:48:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:16,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:16,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:16,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:16,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624650345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:16,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:16,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:48:16,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184940159] [2022-02-15 14:48:16,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:16,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:48:16,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:16,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:48:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:48:16,818 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:18,418 INFO L93 Difference]: Finished difference Result 672 states and 1328 transitions. [2022-02-15 14:48:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:48:18,419 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:18,420 INFO L225 Difference]: With dead ends: 672 [2022-02-15 14:48:18,420 INFO L226 Difference]: Without dead ends: 657 [2022-02-15 14:48:18,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=430, Invalid=3730, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:48:18,420 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 143 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:18,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 457 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:48:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-02-15 14:48:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 411. [2022-02-15 14:48:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:18,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-02-15 14:48:18,427 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-02-15 14:48:18,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:18,427 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-02-15 14:48:18,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:18,427 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-02-15 14:48:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:18,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:18,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:18,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:18,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:18,651 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash 959112329, now seen corresponding path program 173 times [2022-02-15 14:48:18,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:18,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578044647] [2022-02-15 14:48:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:18,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:18,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:18,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578044647] [2022-02-15 14:48:18,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578044647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:18,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274966195] [2022-02-15 14:48:18,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:48:18,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:18,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:18,967 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:18,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-15 14:48:18,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:48:18,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:18,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:18,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:19,185 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 15 treesize of output 7 [2022-02-15 14:48:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:19,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:19,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:19,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:20,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274966195] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:20,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:20,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:48:20,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819668361] [2022-02-15 14:48:20,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:20,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:48:20,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:20,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:48:20,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:48:20,093 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:21,335 INFO L93 Difference]: Finished difference Result 719 states and 1409 transitions. [2022-02-15 14:48:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 14:48:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:21,337 INFO L225 Difference]: With dead ends: 719 [2022-02-15 14:48:21,337 INFO L226 Difference]: Without dead ends: 701 [2022-02-15 14:48:21,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=3173, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 14:48:21,337 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 139 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:21,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 505 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1683 Invalid, 0 Unknown, 76 Unchecked, 0.6s Time] [2022-02-15 14:48:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-02-15 14:48:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 425. [2022-02-15 14:48:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.9858490566037736) internal successors, (842), 424 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 842 transitions. [2022-02-15 14:48:21,343 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 842 transitions. Word has length 30 [2022-02-15 14:48:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:21,343 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 842 transitions. [2022-02-15 14:48:21,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 842 transitions. [2022-02-15 14:48:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:21,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:21,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:21,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:21,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:21,545 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:21,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1936553865, now seen corresponding path program 174 times [2022-02-15 14:48:21,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:21,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49283507] [2022-02-15 14:48:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:21,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:21,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:21,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49283507] [2022-02-15 14:48:21,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49283507] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:21,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933606206] [2022-02-15 14:48:21,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:48:21,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:21,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:21,888 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:21,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-15 14:48:21,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:48:21,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:21,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:21,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:22,071 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 11 treesize of output 7 [2022-02-15 14:48:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:22,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:22,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:22,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:22,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933606206] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:22,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:22,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:48:22,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370572459] [2022-02-15 14:48:22,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:22,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:48:22,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:22,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:48:22,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:48:22,905 INFO L87 Difference]: Start difference. First operand 425 states and 842 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:24,170 INFO L93 Difference]: Finished difference Result 780 states and 1536 transitions. [2022-02-15 14:48:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:48:24,170 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:24,171 INFO L225 Difference]: With dead ends: 780 [2022-02-15 14:48:24,171 INFO L226 Difference]: Without dead ends: 748 [2022-02-15 14:48:24,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=394, Invalid=3266, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 14:48:24,172 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 132 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:24,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 493 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:48:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-02-15 14:48:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 403. [2022-02-15 14:48:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0049751243781095) internal successors, (806), 402 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 806 transitions. [2022-02-15 14:48:24,177 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 806 transitions. Word has length 30 [2022-02-15 14:48:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:24,177 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 806 transitions. [2022-02-15 14:48:24,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 806 transitions. [2022-02-15 14:48:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:24,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:24,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:24,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:24,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:24,378 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1387562039, now seen corresponding path program 175 times [2022-02-15 14:48:24,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:24,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553000558] [2022-02-15 14:48:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:24,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:24,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:24,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553000558] [2022-02-15 14:48:24,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553000558] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:24,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481212869] [2022-02-15 14:48:24,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:48:24,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:24,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:24,686 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:24,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-15 14:48:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:24,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:24,876 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 11 treesize of output 7 [2022-02-15 14:48:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:25,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:25,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:25,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:25,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481212869] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:25,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:25,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:48:25,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049997089] [2022-02-15 14:48:25,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:25,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:48:25,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:48:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:48:25,742 INFO L87 Difference]: Start difference. First operand 403 states and 806 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:26,851 INFO L93 Difference]: Finished difference Result 776 states and 1531 transitions. [2022-02-15 14:48:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:48:26,852 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:26,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:26,852 INFO L225 Difference]: With dead ends: 776 [2022-02-15 14:48:26,852 INFO L226 Difference]: Without dead ends: 743 [2022-02-15 14:48:26,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=385, Invalid=3397, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:48:26,853 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 139 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:26,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 357 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:48:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-02-15 14:48:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 401. [2022-02-15 14:48:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.005) internal successors, (802), 400 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:26,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 802 transitions. [2022-02-15 14:48:26,859 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 802 transitions. Word has length 30 [2022-02-15 14:48:26,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:26,859 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 802 transitions. [2022-02-15 14:48:26,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 802 transitions. [2022-02-15 14:48:26,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:26,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:26,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:26,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:27,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:27,060 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash 567896517, now seen corresponding path program 176 times [2022-02-15 14:48:27,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:27,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457495662] [2022-02-15 14:48:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:27,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:27,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:27,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457495662] [2022-02-15 14:48:27,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457495662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:27,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212467055] [2022-02-15 14:48:27,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:48:27,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:27,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:27,436 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:27,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-15 14:48:27,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:48:27,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:27,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:27,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:27,630 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 15 treesize of output 7 [2022-02-15 14:48:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:28,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:28,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:28,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:28,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212467055] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:28,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:28,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-02-15 14:48:28,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753321630] [2022-02-15 14:48:28,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:28,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 14:48:28,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:28,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 14:48:28,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:48:28,600 INFO L87 Difference]: Start difference. First operand 401 states and 802 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:29,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:29,778 INFO L93 Difference]: Finished difference Result 752 states and 1483 transitions. [2022-02-15 14:48:29,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:48:29,779 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:29,779 INFO L225 Difference]: With dead ends: 752 [2022-02-15 14:48:29,779 INFO L226 Difference]: Without dead ends: 731 [2022-02-15 14:48:29,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=394, Invalid=3766, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:48:29,780 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 123 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:29,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 501 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1426 Invalid, 0 Unknown, 165 Unchecked, 0.5s Time] [2022-02-15 14:48:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-02-15 14:48:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 417. [2022-02-15 14:48:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.9831730769230769) internal successors, (825), 416 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 825 transitions. [2022-02-15 14:48:29,785 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 825 transitions. Word has length 30 [2022-02-15 14:48:29,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:29,785 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 825 transitions. [2022-02-15 14:48:29,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:29,785 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 825 transitions. [2022-02-15 14:48:29,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:29,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:29,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:29,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:29,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:29,986 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:29,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:29,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1858049183, now seen corresponding path program 177 times [2022-02-15 14:48:29,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:29,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553642931] [2022-02-15 14:48:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:29,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:30,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:30,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553642931] [2022-02-15 14:48:30,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553642931] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:30,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577467477] [2022-02-15 14:48:30,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:48:30,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:30,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:30,344 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:30,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-15 14:48:30,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:48:30,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:30,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:30,588 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 15 treesize of output 7 [2022-02-15 14:48:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:30,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:31,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:31,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:31,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577467477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:31,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:31,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-02-15 14:48:31,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108722585] [2022-02-15 14:48:31,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:31,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 14:48:31,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:31,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 14:48:31,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:48:31,529 INFO L87 Difference]: Start difference. First operand 417 states and 825 transitions. Second operand has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:32,869 INFO L93 Difference]: Finished difference Result 749 states and 1481 transitions. [2022-02-15 14:48:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 14:48:32,870 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:32,870 INFO L225 Difference]: With dead ends: 749 [2022-02-15 14:48:32,871 INFO L226 Difference]: Without dead ends: 726 [2022-02-15 14:48:32,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=410, Invalid=3880, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 14:48:32,871 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 105 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:32,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 513 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:48:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-02-15 14:48:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 397. [2022-02-15 14:48:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2022-02-15 14:48:32,876 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2022-02-15 14:48:32,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:32,876 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2022-02-15 14:48:32,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:32,876 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2022-02-15 14:48:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:32,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:32,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:32,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:33,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-02-15 14:48:33,077 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:33,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:33,078 INFO L85 PathProgramCache]: Analyzing trace with hash 854882193, now seen corresponding path program 178 times [2022-02-15 14:48:33,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:33,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920570847] [2022-02-15 14:48:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:33,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:33,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:33,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920570847] [2022-02-15 14:48:33,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920570847] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:33,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9802571] [2022-02-15 14:48:33,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:48:33,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:33,395 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:33,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-15 14:48:33,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:48:33,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:33,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:33,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:33,613 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 15 treesize of output 7 [2022-02-15 14:48:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:33,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:34,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:34,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:34,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9802571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:34,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:34,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:48:34,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32748302] [2022-02-15 14:48:34,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:34,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:48:34,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:34,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:48:34,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:48:34,451 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:37,023 INFO L93 Difference]: Finished difference Result 978 states and 1927 transitions. [2022-02-15 14:48:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 14:48:37,023 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:37,024 INFO L225 Difference]: With dead ends: 978 [2022-02-15 14:48:37,024 INFO L226 Difference]: Without dead ends: 969 [2022-02-15 14:48:37,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=739, Invalid=6067, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 14:48:37,025 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 241 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:37,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 450 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:48:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-02-15 14:48:37,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 415. [2022-02-15 14:48:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0193236714975846) internal successors, (836), 414 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:37,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 836 transitions. [2022-02-15 14:48:37,030 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 836 transitions. Word has length 30 [2022-02-15 14:48:37,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:37,030 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 836 transitions. [2022-02-15 14:48:37,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 836 transitions. [2022-02-15 14:48:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:37,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:37,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:37,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-02-15 14:48:37,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-02-15 14:48:37,233 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:37,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1736947917, now seen corresponding path program 179 times [2022-02-15 14:48:37,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:37,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848560490] [2022-02-15 14:48:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:37,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:37,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:37,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848560490] [2022-02-15 14:48:37,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848560490] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:37,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501359393] [2022-02-15 14:48:37,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:48:37,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:37,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:37,552 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:37,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-15 14:48:37,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:48:37,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:37,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:48:37,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:37,770 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 11 treesize of output 7 [2022-02-15 14:48:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:38,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:38,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:38,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:38,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501359393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:38,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:38,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:48:38,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772288016] [2022-02-15 14:48:38,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:38,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:48:38,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:48:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:48:38,711 INFO L87 Difference]: Start difference. First operand 415 states and 836 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:41,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:41,521 INFO L93 Difference]: Finished difference Result 816 states and 1607 transitions. [2022-02-15 14:48:41,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 14:48:41,521 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:41,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:41,522 INFO L225 Difference]: With dead ends: 816 [2022-02-15 14:48:41,522 INFO L226 Difference]: Without dead ends: 791 [2022-02-15 14:48:41,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=776, Invalid=6196, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 14:48:41,523 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 250 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:41,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 451 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2305 Invalid, 0 Unknown, 92 Unchecked, 0.9s Time] [2022-02-15 14:48:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-15 14:48:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 413. [2022-02-15 14:48:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0194174757281553) internal successors, (832), 412 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 832 transitions. [2022-02-15 14:48:41,528 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 832 transitions. Word has length 30 [2022-02-15 14:48:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:41,528 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 832 transitions. [2022-02-15 14:48:41,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:41,528 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 832 transitions. [2022-02-15 14:48:41,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:41,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:41,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:41,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:41,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:41,731 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:41,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:41,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1089352661, now seen corresponding path program 180 times [2022-02-15 14:48:41,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:41,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075514375] [2022-02-15 14:48:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:41,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:42,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:42,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075514375] [2022-02-15 14:48:42,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075514375] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:42,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578705780] [2022-02-15 14:48:42,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:48:42,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:42,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:42,060 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:42,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-15 14:48:42,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:48:42,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:42,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:42,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:42,275 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 11 treesize of output 7 [2022-02-15 14:48:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:42,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:43,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:43,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:48:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:43,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578705780] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:43,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:43,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-02-15 14:48:43,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915771965] [2022-02-15 14:48:43,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:43,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 14:48:43,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 14:48:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:48:43,187 INFO L87 Difference]: Start difference. First operand 413 states and 832 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:46,243 INFO L93 Difference]: Finished difference Result 1107 states and 2170 transitions. [2022-02-15 14:48:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 14:48:46,244 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:46,245 INFO L225 Difference]: With dead ends: 1107 [2022-02-15 14:48:46,245 INFO L226 Difference]: Without dead ends: 1055 [2022-02-15 14:48:46,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1198, Invalid=8114, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 14:48:46,246 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 326 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:46,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 489 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 14:48:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-02-15 14:48:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 412. [2022-02-15 14:48:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.004866180048662) internal successors, (824), 411 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 824 transitions. [2022-02-15 14:48:46,252 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 824 transitions. Word has length 30 [2022-02-15 14:48:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:46,252 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 824 transitions. [2022-02-15 14:48:46,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 824 transitions. [2022-02-15 14:48:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:46,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:46,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:46,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:46,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:46,453 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:46,453 INFO L85 PathProgramCache]: Analyzing trace with hash -200734271, now seen corresponding path program 181 times [2022-02-15 14:48:46,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:46,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109093912] [2022-02-15 14:48:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:46,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:46,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:46,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109093912] [2022-02-15 14:48:46,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109093912] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:46,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213740491] [2022-02-15 14:48:46,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:48:46,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:46,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:46,774 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:46,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-15 14:48:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:46,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:46,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:46,994 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 15 treesize of output 7 [2022-02-15 14:48:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:47,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:47,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:47,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:47,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213740491] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:47,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:47,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:48:47,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495981554] [2022-02-15 14:48:47,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:47,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:48:47,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:47,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:48:47,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:48:47,861 INFO L87 Difference]: Start difference. First operand 412 states and 824 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:49,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:49,746 INFO L93 Difference]: Finished difference Result 851 states and 1676 transitions. [2022-02-15 14:48:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 14:48:49,746 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:49,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:49,747 INFO L225 Difference]: With dead ends: 851 [2022-02-15 14:48:49,747 INFO L226 Difference]: Without dead ends: 842 [2022-02-15 14:48:49,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=547, Invalid=4855, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 14:48:49,748 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 192 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:49,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 357 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:48:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-02-15 14:48:49,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 414. [2022-02-15 14:48:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.002421307506053) internal successors, (827), 413 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 827 transitions. [2022-02-15 14:48:49,753 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 827 transitions. Word has length 30 [2022-02-15 14:48:49,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:49,754 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 827 transitions. [2022-02-15 14:48:49,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:49,754 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 827 transitions. [2022-02-15 14:48:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:49,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:49,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:49,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-02-15 14:48:49,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:49,955 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash 681331453, now seen corresponding path program 182 times [2022-02-15 14:48:49,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:49,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087151919] [2022-02-15 14:48:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:49,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:50,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:50,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087151919] [2022-02-15 14:48:50,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087151919] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:50,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167405333] [2022-02-15 14:48:50,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:48:50,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:50,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:50,277 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:50,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-15 14:48:50,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:48:50,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:50,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:50,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:50,500 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 11 treesize of output 7 [2022-02-15 14:48:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:50,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:51,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:51,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:51,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167405333] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:51,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:51,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:48:51,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34861255] [2022-02-15 14:48:51,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:51,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:48:51,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:51,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:48:51,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:48:51,394 INFO L87 Difference]: Start difference. First operand 414 states and 827 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:54,342 INFO L93 Difference]: Finished difference Result 992 states and 1978 transitions. [2022-02-15 14:48:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 14:48:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:54,344 INFO L225 Difference]: With dead ends: 992 [2022-02-15 14:48:54,344 INFO L226 Difference]: Without dead ends: 959 [2022-02-15 14:48:54,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 14 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=722, Invalid=6084, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 14:48:54,344 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 194 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:54,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 540 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2425 Invalid, 0 Unknown, 85 Unchecked, 0.9s Time] [2022-02-15 14:48:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-02-15 14:48:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 404. [2022-02-15 14:48:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0148883374689825) internal successors, (812), 403 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 812 transitions. [2022-02-15 14:48:54,350 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 812 transitions. Word has length 30 [2022-02-15 14:48:54,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:54,350 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 812 transitions. [2022-02-15 14:48:54,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:54,350 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 812 transitions. [2022-02-15 14:48:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:54,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:54,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:54,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-02-15 14:48:54,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:54,551 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:54,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash -196676197, now seen corresponding path program 183 times [2022-02-15 14:48:54,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:54,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993139047] [2022-02-15 14:48:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:54,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:54,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:54,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993139047] [2022-02-15 14:48:54,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993139047] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:54,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468009702] [2022-02-15 14:48:54,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:48:54,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:54,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:54,894 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:54,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-15 14:48:54,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:48:54,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:54,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:54,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:55,117 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 15 treesize of output 7 [2022-02-15 14:48:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:55,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:55,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:55,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:55,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468009702] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:55,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:55,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:48:55,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374211465] [2022-02-15 14:48:55,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:55,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:48:55,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:55,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:48:55,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:48:55,980 INFO L87 Difference]: Start difference. First operand 404 states and 812 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:58,017 INFO L93 Difference]: Finished difference Result 832 states and 1644 transitions. [2022-02-15 14:48:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 14:48:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:48:58,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:58,018 INFO L225 Difference]: With dead ends: 832 [2022-02-15 14:48:58,019 INFO L226 Difference]: Without dead ends: 815 [2022-02-15 14:48:58,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=597, Invalid=5103, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 14:48:58,019 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 168 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:58,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 507 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1724 Invalid, 0 Unknown, 348 Unchecked, 0.7s Time] [2022-02-15 14:48:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-02-15 14:48:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 418. [2022-02-15 14:48:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.9952038369304557) internal successors, (832), 417 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 832 transitions. [2022-02-15 14:48:58,024 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 832 transitions. Word has length 30 [2022-02-15 14:48:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:58,024 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 832 transitions. [2022-02-15 14:48:58,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 832 transitions. [2022-02-15 14:48:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:48:58,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:58,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:58,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-02-15 14:48:58,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:58,225 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:58,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1672345399, now seen corresponding path program 184 times [2022-02-15 14:48:58,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:58,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063208311] [2022-02-15 14:48:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:58,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:58,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:58,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063208311] [2022-02-15 14:48:58,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063208311] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:48:58,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301282667] [2022-02-15 14:48:58,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:48:58,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:48:58,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:58,531 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:48:58,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-15 14:48:58,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:48:58,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:48:58,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:48:58,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:48:58,761 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 11 treesize of output 7 [2022-02-15 14:48:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:59,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:48:59,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:48:59,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:48:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:59,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301282667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:48:59,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:48:59,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:48:59,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567767724] [2022-02-15 14:48:59,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:48:59,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:48:59,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:59,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:48:59,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:48:59,618 INFO L87 Difference]: Start difference. First operand 418 states and 832 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:01,537 INFO L93 Difference]: Finished difference Result 836 states and 1653 transitions. [2022-02-15 14:49:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:49:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:01,538 INFO L225 Difference]: With dead ends: 836 [2022-02-15 14:49:01,538 INFO L226 Difference]: Without dead ends: 815 [2022-02-15 14:49:01,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=548, Invalid=4708, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 14:49:01,539 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 184 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:01,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 408 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:49:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-02-15 14:49:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 401. [2022-02-15 14:49:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0175) internal successors, (807), 400 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 807 transitions. [2022-02-15 14:49:01,544 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 807 transitions. Word has length 30 [2022-02-15 14:49:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:01,544 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 807 transitions. [2022-02-15 14:49:01,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 807 transitions. [2022-02-15 14:49:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:01,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:01,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:01,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:01,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:01,745 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:01,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:01,745 INFO L85 PathProgramCache]: Analyzing trace with hash 289461307, now seen corresponding path program 185 times [2022-02-15 14:49:01,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:01,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151635961] [2022-02-15 14:49:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:01,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:02,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:02,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151635961] [2022-02-15 14:49:02,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151635961] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:02,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309952706] [2022-02-15 14:49:02,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:49:02,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:02,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:02,061 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:02,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-15 14:49:02,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:02,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:02,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:02,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:02,284 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 15 treesize of output 7 [2022-02-15 14:49:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:02,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:03,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:03,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:03,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309952706] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:03,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:03,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:49:03,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699102487] [2022-02-15 14:49:03,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:03,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:49:03,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:03,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:49:03,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:49:03,207 INFO L87 Difference]: Start difference. First operand 401 states and 807 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:05,172 INFO L93 Difference]: Finished difference Result 850 states and 1672 transitions. [2022-02-15 14:49:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:49:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:05,173 INFO L225 Difference]: With dead ends: 850 [2022-02-15 14:49:05,173 INFO L226 Difference]: Without dead ends: 841 [2022-02-15 14:49:05,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 14:49:05,174 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 158 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:05,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 573 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2540 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 14:49:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-02-15 14:49:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 415. [2022-02-15 14:49:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0120772946859904) internal successors, (833), 414 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 833 transitions. [2022-02-15 14:49:05,184 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 833 transitions. Word has length 30 [2022-02-15 14:49:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:05,184 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 833 transitions. [2022-02-15 14:49:05,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 833 transitions. [2022-02-15 14:49:05,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:05,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:05,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:05,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:05,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:05,387 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:05,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1171527031, now seen corresponding path program 186 times [2022-02-15 14:49:05,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:05,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141531220] [2022-02-15 14:49:05,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:05,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:05,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:05,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141531220] [2022-02-15 14:49:05,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141531220] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:05,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130427464] [2022-02-15 14:49:05,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:49:05,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:05,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:05,705 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:05,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-15 14:49:05,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:49:05,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:05,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:05,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:05,926 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 11 treesize of output 7 [2022-02-15 14:49:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:06,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:06,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:06,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:06,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130427464] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:06,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:06,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:49:06,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879623786] [2022-02-15 14:49:06,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:06,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:49:06,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:06,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:49:06,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:49:06,809 INFO L87 Difference]: Start difference. First operand 415 states and 833 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:08,861 INFO L93 Difference]: Finished difference Result 721 states and 1421 transitions. [2022-02-15 14:49:08,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:49:08,861 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:08,862 INFO L225 Difference]: With dead ends: 721 [2022-02-15 14:49:08,862 INFO L226 Difference]: Without dead ends: 696 [2022-02-15 14:49:08,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=527, Invalid=4875, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 14:49:08,863 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 187 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:08,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 443 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2071 Invalid, 0 Unknown, 155 Unchecked, 0.8s Time] [2022-02-15 14:49:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-02-15 14:49:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 413. [2022-02-15 14:49:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.012135922330097) internal successors, (829), 412 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 829 transitions. [2022-02-15 14:49:08,868 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 829 transitions. Word has length 30 [2022-02-15 14:49:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:08,868 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 829 transitions. [2022-02-15 14:49:08,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 829 transitions. [2022-02-15 14:49:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:08,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:08,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:08,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:09,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:09,069 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:09,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:09,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1654773547, now seen corresponding path program 187 times [2022-02-15 14:49:09,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:09,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820199235] [2022-02-15 14:49:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:09,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:09,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:09,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820199235] [2022-02-15 14:49:09,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820199235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:09,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668073553] [2022-02-15 14:49:09,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:49:09,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:09,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:09,380 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:09,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-15 14:49:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:09,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:09,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:09,587 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 15 treesize of output 7 [2022-02-15 14:49:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:09,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:10,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:10,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:10,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668073553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:10,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:10,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:49:10,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179169687] [2022-02-15 14:49:10,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:10,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:49:10,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:10,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:49:10,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:49:10,358 INFO L87 Difference]: Start difference. First operand 413 states and 829 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:11,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:11,983 INFO L93 Difference]: Finished difference Result 849 states and 1674 transitions. [2022-02-15 14:49:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:49:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:11,984 INFO L225 Difference]: With dead ends: 849 [2022-02-15 14:49:11,984 INFO L226 Difference]: Without dead ends: 804 [2022-02-15 14:49:11,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=4091, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 14:49:11,985 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 164 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:11,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 456 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1875 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:49:11,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-02-15 14:49:11,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 405. [2022-02-15 14:49:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.012376237623762) internal successors, (813), 404 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 813 transitions. [2022-02-15 14:49:11,990 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 813 transitions. Word has length 30 [2022-02-15 14:49:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:11,990 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 813 transitions. [2022-02-15 14:49:11,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 813 transitions. [2022-02-15 14:49:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:11,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:11,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:12,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:12,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-02-15 14:49:12,208 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash 293519381, now seen corresponding path program 188 times [2022-02-15 14:49:12,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:12,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902976606] [2022-02-15 14:49:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:12,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:12,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:12,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902976606] [2022-02-15 14:49:12,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902976606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:12,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302838499] [2022-02-15 14:49:12,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:49:12,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:12,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:12,510 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:12,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-15 14:49:12,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:12,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:12,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:12,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:12,728 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 11 treesize of output 7 [2022-02-15 14:49:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:13,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:13,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:13,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:13,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302838499] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:13,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:13,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:49:13,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560208707] [2022-02-15 14:49:13,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:13,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:49:13,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:13,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:49:13,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:49:13,559 INFO L87 Difference]: Start difference. First operand 405 states and 813 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:15,243 INFO L93 Difference]: Finished difference Result 832 states and 1643 transitions. [2022-02-15 14:49:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:49:15,244 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:15,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:15,244 INFO L225 Difference]: With dead ends: 832 [2022-02-15 14:49:15,245 INFO L226 Difference]: Without dead ends: 799 [2022-02-15 14:49:15,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=456, Invalid=4236, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:49:15,245 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 149 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:15,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 481 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:49:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-02-15 14:49:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 403. [2022-02-15 14:49:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2022-02-15 14:49:15,251 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2022-02-15 14:49:15,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:15,251 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2022-02-15 14:49:15,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2022-02-15 14:49:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:15,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:15,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:15,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:15,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-02-15 14:49:15,455 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:15,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:15,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2045989359, now seen corresponding path program 189 times [2022-02-15 14:49:15,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:15,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719355093] [2022-02-15 14:49:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:15,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:15,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:15,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719355093] [2022-02-15 14:49:15,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719355093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:15,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811897011] [2022-02-15 14:49:15,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:49:15,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:15,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:15,779 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:15,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-15 14:49:15,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:49:15,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:15,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:15,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:16,006 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 15 treesize of output 7 [2022-02-15 14:49:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:16,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:16,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:16,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:16,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811897011] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:16,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:16,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-02-15 14:49:16,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28696616] [2022-02-15 14:49:16,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:16,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 14:49:16,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:16,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 14:49:16,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:49:16,917 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:18,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:18,876 INFO L93 Difference]: Finished difference Result 833 states and 1644 transitions. [2022-02-15 14:49:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:49:18,876 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:18,877 INFO L225 Difference]: With dead ends: 833 [2022-02-15 14:49:18,877 INFO L226 Difference]: Without dead ends: 797 [2022-02-15 14:49:18,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=481, Invalid=4775, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 14:49:18,878 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 144 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 2589 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 2643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:18,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 667 Invalid, 2643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2589 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 14:49:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-02-15 14:49:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 400. [2022-02-15 14:49:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0150375939849625) internal successors, (804), 399 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 804 transitions. [2022-02-15 14:49:18,883 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 804 transitions. Word has length 30 [2022-02-15 14:49:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:18,883 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 804 transitions. [2022-02-15 14:49:18,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 804 transitions. [2022-02-15 14:49:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:18,884 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:18,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:18,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:19,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-02-15 14:49:19,084 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:19,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1389143995, now seen corresponding path program 190 times [2022-02-15 14:49:19,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:19,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242717235] [2022-02-15 14:49:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:19,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:19,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:19,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242717235] [2022-02-15 14:49:19,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242717235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:19,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465677775] [2022-02-15 14:49:19,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:49:19,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:19,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:19,416 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:19,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-15 14:49:19,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:49:19,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:19,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:19,661 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 15 treesize of output 7 [2022-02-15 14:49:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:19,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:20,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:20,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:20,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465677775] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:20,459 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:20,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:49:20,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867050053] [2022-02-15 14:49:20,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:20,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:49:20,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:20,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:49:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:49:20,460 INFO L87 Difference]: Start difference. First operand 400 states and 804 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:21,937 INFO L93 Difference]: Finished difference Result 841 states and 1649 transitions. [2022-02-15 14:49:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:49:21,937 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:21,938 INFO L225 Difference]: With dead ends: 841 [2022-02-15 14:49:21,938 INFO L226 Difference]: Without dead ends: 832 [2022-02-15 14:49:21,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 14:49:21,939 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 174 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:21,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 442 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:49:21,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-02-15 14:49:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 429. [2022-02-15 14:49:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.0093457943925235) internal successors, (860), 428 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 860 transitions. [2022-02-15 14:49:21,944 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 860 transitions. Word has length 30 [2022-02-15 14:49:21,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:21,945 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 860 transitions. [2022-02-15 14:49:21,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 860 transitions. [2022-02-15 14:49:21,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:21,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:21,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:21,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-02-15 14:49:22,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-02-15 14:49:22,159 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:22,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:22,160 INFO L85 PathProgramCache]: Analyzing trace with hash -507078271, now seen corresponding path program 191 times [2022-02-15 14:49:22,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:22,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603476392] [2022-02-15 14:49:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:22,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:22,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:22,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603476392] [2022-02-15 14:49:22,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603476392] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:22,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180729467] [2022-02-15 14:49:22,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:49:22,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:22,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:22,475 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:22,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-15 14:49:22,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:22,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:22,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:49:22,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:22,718 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 11 treesize of output 7 [2022-02-15 14:49:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:22,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:23,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:23,381 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 28 treesize of output 30 [2022-02-15 14:49:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:23,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180729467] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:23,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:23,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:49:23,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773231036] [2022-02-15 14:49:23,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:23,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:49:23,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:49:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:49:23,543 INFO L87 Difference]: Start difference. First operand 429 states and 860 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:25,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:25,330 INFO L93 Difference]: Finished difference Result 687 states and 1351 transitions. [2022-02-15 14:49:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:49:25,330 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:25,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:25,331 INFO L225 Difference]: With dead ends: 687 [2022-02-15 14:49:25,331 INFO L226 Difference]: Without dead ends: 672 [2022-02-15 14:49:25,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=444, Invalid=4386, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 14:49:25,331 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 166 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:25,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 451 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:49:25,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-02-15 14:49:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 425. [2022-02-15 14:49:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.009433962264151) internal successors, (852), 424 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 852 transitions. [2022-02-15 14:49:25,335 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 852 transitions. Word has length 30 [2022-02-15 14:49:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:25,336 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 852 transitions. [2022-02-15 14:49:25,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:25,336 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 852 transitions. [2022-02-15 14:49:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:25,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:25,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:25,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:25,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:25,537 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:25,537 INFO L85 PathProgramCache]: Analyzing trace with hash 961588447, now seen corresponding path program 192 times [2022-02-15 14:49:25,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:25,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402760293] [2022-02-15 14:49:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:25,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:25,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:25,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402760293] [2022-02-15 14:49:25,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402760293] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:25,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930598024] [2022-02-15 14:49:25,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:49:25,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:25,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:25,857 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:25,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-15 14:49:25,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:49:25,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:25,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:25,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:26,091 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 11 treesize of output 7 [2022-02-15 14:49:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:26,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:26,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:26,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:26,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930598024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:26,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:26,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-02-15 14:49:26,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648881275] [2022-02-15 14:49:26,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:26,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 14:49:26,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:26,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 14:49:26,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 14:49:26,828 INFO L87 Difference]: Start difference. First operand 425 states and 852 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:28,178 INFO L93 Difference]: Finished difference Result 848 states and 1662 transitions. [2022-02-15 14:49:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 14:49:28,178 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:28,179 INFO L225 Difference]: With dead ends: 848 [2022-02-15 14:49:28,179 INFO L226 Difference]: Without dead ends: 803 [2022-02-15 14:49:28,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=379, Invalid=3527, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 14:49:28,180 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 152 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:28,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 469 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:49:28,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-02-15 14:49:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 412. [2022-02-15 14:49:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.0097323600973236) internal successors, (826), 411 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 826 transitions. [2022-02-15 14:49:28,185 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 826 transitions. Word has length 30 [2022-02-15 14:49:28,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:28,185 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 826 transitions. [2022-02-15 14:49:28,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:28,185 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 826 transitions. [2022-02-15 14:49:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:28,186 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:28,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:28,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-02-15 14:49:28,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:28,386 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:28,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1385085921, now seen corresponding path program 193 times [2022-02-15 14:49:28,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:28,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934847937] [2022-02-15 14:49:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:28,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:28,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:28,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934847937] [2022-02-15 14:49:28,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934847937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:28,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485552379] [2022-02-15 14:49:28,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:49:28,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:28,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:28,687 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:28,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-15 14:49:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:28,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:28,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:28,938 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 11 treesize of output 7 [2022-02-15 14:49:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:29,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:29,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:29,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:29,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485552379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:29,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:29,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-02-15 14:49:29,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857184922] [2022-02-15 14:49:29,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:29,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 14:49:29,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:29,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 14:49:29,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:49:29,738 INFO L87 Difference]: Start difference. First operand 412 states and 826 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:31,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:31,243 INFO L93 Difference]: Finished difference Result 852 states and 1666 transitions. [2022-02-15 14:49:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:49:31,243 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:31,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:31,244 INFO L225 Difference]: With dead ends: 852 [2022-02-15 14:49:31,244 INFO L226 Difference]: Without dead ends: 819 [2022-02-15 14:49:31,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=402, Invalid=4020, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 14:49:31,244 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 164 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:31,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 527 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 14:49:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-02-15 14:49:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 409. [2022-02-15 14:49:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2022-02-15 14:49:31,249 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2022-02-15 14:49:31,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:31,250 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2022-02-15 14:49:31,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:31,250 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2022-02-15 14:49:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:31,250 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:31,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:31,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:31,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-02-15 14:49:31,451 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:31,451 INFO L85 PathProgramCache]: Analyzing trace with hash 570372635, now seen corresponding path program 194 times [2022-02-15 14:49:31,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:31,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129208302] [2022-02-15 14:49:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:31,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:31,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:31,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129208302] [2022-02-15 14:49:31,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129208302] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:31,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879518752] [2022-02-15 14:49:31,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:49:31,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:31,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:31,775 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:31,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-15 14:49:31,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:31,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:31,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:31,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:32,029 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 15 treesize of output 7 [2022-02-15 14:49:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:32,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:32,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:32,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:32,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879518752] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:32,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:32,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-02-15 14:49:32,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587957674] [2022-02-15 14:49:32,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:32,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 14:49:32,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:32,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 14:49:32,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1881, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 14:49:32,919 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:34,759 INFO L93 Difference]: Finished difference Result 850 states and 1662 transitions. [2022-02-15 14:49:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:49:34,760 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:34,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:34,761 INFO L225 Difference]: With dead ends: 850 [2022-02-15 14:49:34,761 INFO L226 Difference]: Without dead ends: 814 [2022-02-15 14:49:34,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=427, Invalid=4543, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 14:49:34,761 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 155 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 2704 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:34,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 738 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2704 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 14:49:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-02-15 14:49:34,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 406. [2022-02-15 14:49:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2022-02-15 14:49:34,766 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2022-02-15 14:49:34,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:34,766 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2022-02-15 14:49:34,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2022-02-15 14:49:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:34,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:34,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:34,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:34,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-02-15 14:49:34,968 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash 86969375, now seen corresponding path program 195 times [2022-02-15 14:49:34,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:34,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422571625] [2022-02-15 14:49:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:34,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:35,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:35,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422571625] [2022-02-15 14:49:35,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422571625] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:35,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597083042] [2022-02-15 14:49:35,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:49:35,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:35,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:35,295 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:35,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-15 14:49:35,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:49:35,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:35,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:35,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:35,594 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 11 treesize of output 7 [2022-02-15 14:49:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:35,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:36,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:36,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:49:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:36,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597083042] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:36,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:36,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-02-15 14:49:36,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456626146] [2022-02-15 14:49:36,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:36,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 14:49:36,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:36,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 14:49:36,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2234, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 14:49:36,589 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:38,520 INFO L93 Difference]: Finished difference Result 828 states and 1620 transitions. [2022-02-15 14:49:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:49:38,520 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:38,521 INFO L225 Difference]: With dead ends: 828 [2022-02-15 14:49:38,521 INFO L226 Difference]: Without dead ends: 821 [2022-02-15 14:49:38,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=452, Invalid=5098, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 14:49:38,522 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 179 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 2810 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:38,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 823 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2810 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 14:49:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-02-15 14:49:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 391. [2022-02-15 14:49:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0076923076923077) internal successors, (783), 390 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 783 transitions. [2022-02-15 14:49:38,527 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 783 transitions. Word has length 30 [2022-02-15 14:49:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:38,527 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 783 transitions. [2022-02-15 14:49:38,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:38,527 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 783 transitions. [2022-02-15 14:49:38,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:38,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:38,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:38,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:38,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:38,728 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:38,728 INFO L85 PathProgramCache]: Analyzing trace with hash -925882297, now seen corresponding path program 196 times [2022-02-15 14:49:38,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:38,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167437854] [2022-02-15 14:49:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:38,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:39,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:39,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167437854] [2022-02-15 14:49:39,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167437854] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:39,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045466203] [2022-02-15 14:49:39,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:49:39,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:39,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:39,017 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:39,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-15 14:49:39,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:49:39,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:39,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:39,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:39,107 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 15 treesize of output 7 [2022-02-15 14:49:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:39,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:39,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:39,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:39,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045466203] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:39,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:39,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-02-15 14:49:39,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17189111] [2022-02-15 14:49:39,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:39,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 14:49:39,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:39,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 14:49:39,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 14:49:39,895 INFO L87 Difference]: Start difference. First operand 391 states and 783 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:41,477 INFO L93 Difference]: Finished difference Result 800 states and 1577 transitions. [2022-02-15 14:49:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 14:49:41,477 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:41,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:41,478 INFO L225 Difference]: With dead ends: 800 [2022-02-15 14:49:41,478 INFO L226 Difference]: Without dead ends: 791 [2022-02-15 14:49:41,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=428, Invalid=3354, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:49:41,479 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:41,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 466 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 14:49:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-15 14:49:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 421. [2022-02-15 14:49:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.9976190476190476) internal successors, (839), 420 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 839 transitions. [2022-02-15 14:49:41,484 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 839 transitions. Word has length 30 [2022-02-15 14:49:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:41,484 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 839 transitions. [2022-02-15 14:49:41,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 839 transitions. [2022-02-15 14:49:41,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:41,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:41,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:41,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:41,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2022-02-15 14:49:41,685 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:41,685 INFO L85 PathProgramCache]: Analyzing trace with hash -43816573, now seen corresponding path program 197 times [2022-02-15 14:49:41,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:41,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316829915] [2022-02-15 14:49:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:41,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:41,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:41,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316829915] [2022-02-15 14:49:41,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316829915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:41,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221605236] [2022-02-15 14:49:41,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:49:41,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:41,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:41,981 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:41,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-15 14:49:42,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:49:42,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:42,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:49:42,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:42,072 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 11 treesize of output 7 [2022-02-15 14:49:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:42,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:42,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:42,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:42,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221605236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:42,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:42,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-02-15 14:49:42,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044344722] [2022-02-15 14:49:42,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:42,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 14:49:42,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 14:49:42,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 14:49:42,888 INFO L87 Difference]: Start difference. First operand 421 states and 839 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:44,367 INFO L93 Difference]: Finished difference Result 685 states and 1361 transitions. [2022-02-15 14:49:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 14:49:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:44,368 INFO L225 Difference]: With dead ends: 685 [2022-02-15 14:49:44,368 INFO L226 Difference]: Without dead ends: 670 [2022-02-15 14:49:44,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=395, Invalid=2911, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 14:49:44,368 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 143 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:44,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 344 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:49:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-02-15 14:49:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 419. [2022-02-15 14:49:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.9976076555023923) internal successors, (835), 418 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 835 transitions. [2022-02-15 14:49:44,373 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 835 transitions. Word has length 30 [2022-02-15 14:49:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:44,373 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 835 transitions. [2022-02-15 14:49:44,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 835 transitions. [2022-02-15 14:49:44,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:44,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:44,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:44,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:44,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:44,574 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:44,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1424850145, now seen corresponding path program 198 times [2022-02-15 14:49:44,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:44,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821697481] [2022-02-15 14:49:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:44,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:44,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:44,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821697481] [2022-02-15 14:49:44,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821697481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:44,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366271505] [2022-02-15 14:49:44,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:49:44,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:44,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:44,871 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:44,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-15 14:49:44,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:49:44,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:44,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:49:44,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:44,959 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 11 treesize of output 7 [2022-02-15 14:49:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:45,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:45,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:45,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:45,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366271505] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:45,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:45,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-02-15 14:49:45,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472194436] [2022-02-15 14:49:45,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:45,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 14:49:45,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:45,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 14:49:45,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 14:49:45,728 INFO L87 Difference]: Start difference. First operand 419 states and 835 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2022-02-15 14:49:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:47,143 INFO L93 Difference]: Finished difference Result 805 states and 1580 transitions. [2022-02-15 14:49:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 14:49:47,143 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:47,144 INFO L225 Difference]: With dead ends: 805 [2022-02-15 14:49:47,144 INFO L226 Difference]: Without dead ends: 768 [2022-02-15 14:49:47,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=421, Invalid=3119, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 14:49:47,144 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 158 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:47,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 379 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:49:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-02-15 14:49:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 417. [2022-02-15 14:49:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.9975961538461537) internal successors, (831), 416 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 831 transitions. [2022-02-15 14:49:47,149 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 831 transitions. Word has length 30 [2022-02-15 14:49:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:47,149 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 831 transitions. [2022-02-15 14:49:47,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2022-02-15 14:49:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 831 transitions. [2022-02-15 14:49:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:47,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:47,150 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:47,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:47,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-02-15 14:49:47,350 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1948415011, now seen corresponding path program 199 times [2022-02-15 14:49:47,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:47,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987668822] [2022-02-15 14:49:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:47,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:47,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:47,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987668822] [2022-02-15 14:49:47,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987668822] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:47,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839164133] [2022-02-15 14:49:47,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:49:47,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:47,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:47,639 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:47,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-15 14:49:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:47,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:47,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:47,728 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 15 treesize of output 7 [2022-02-15 14:49:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:48,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:48,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:48,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:48,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839164133] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:48,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:48,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-02-15 14:49:48,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108494690] [2022-02-15 14:49:48,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:48,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 14:49:48,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 14:49:48,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 14:49:48,527 INFO L87 Difference]: Start difference. First operand 417 states and 831 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:49,902 INFO L93 Difference]: Finished difference Result 790 states and 1558 transitions. [2022-02-15 14:49:49,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 14:49:49,903 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:49,903 INFO L225 Difference]: With dead ends: 790 [2022-02-15 14:49:49,903 INFO L226 Difference]: Without dead ends: 747 [2022-02-15 14:49:49,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=3249, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 14:49:49,904 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 159 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:49,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 368 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:49:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-02-15 14:49:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 402. [2022-02-15 14:49:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.002493765586035) internal successors, (803), 401 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:49,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 803 transitions. [2022-02-15 14:49:49,909 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 803 transitions. Word has length 30 [2022-02-15 14:49:49,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:49,909 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 803 transitions. [2022-02-15 14:49:49,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:49,909 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 803 transitions. [2022-02-15 14:49:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:49,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:49,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:49,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:50,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-02-15 14:49:50,110 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:50,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1532131869, now seen corresponding path program 200 times [2022-02-15 14:49:50,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:50,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608084408] [2022-02-15 14:49:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:50,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:50,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:50,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608084408] [2022-02-15 14:49:50,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608084408] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:50,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219399766] [2022-02-15 14:49:50,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:49:50,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:50,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:50,389 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:50,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-15 14:49:50,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:49:50,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:50,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:50,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:50,478 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 11 treesize of output 7 [2022-02-15 14:49:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:50,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:51,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:51,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 14:49:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:51,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219399766] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:51,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:51,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-02-15 14:49:51,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563901122] [2022-02-15 14:49:51,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:51,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 14:49:51,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:51,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 14:49:51,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 14:49:51,254 INFO L87 Difference]: Start difference. First operand 402 states and 803 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:52,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:52,635 INFO L93 Difference]: Finished difference Result 818 states and 1607 transitions. [2022-02-15 14:49:52,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 14:49:52,636 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:52,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:52,637 INFO L225 Difference]: With dead ends: 818 [2022-02-15 14:49:52,637 INFO L226 Difference]: Without dead ends: 809 [2022-02-15 14:49:52,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=3044, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 14:49:52,637 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 143 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:52,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 311 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:49:52,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-02-15 14:49:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 419. [2022-02-15 14:49:52,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0) internal successors, (836), 418 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 836 transitions. [2022-02-15 14:49:52,642 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 836 transitions. Word has length 30 [2022-02-15 14:49:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:52,643 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 836 transitions. [2022-02-15 14:49:52,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 836 transitions. [2022-02-15 14:49:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:52,643 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:52,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:52,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:52,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-02-15 14:49:52,844 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:52,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:52,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1880769703, now seen corresponding path program 201 times [2022-02-15 14:49:52,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:52,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385375298] [2022-02-15 14:49:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:52,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:53,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:53,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385375298] [2022-02-15 14:49:53,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385375298] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:53,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662250077] [2022-02-15 14:49:53,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:49:53,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:53,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:53,129 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:53,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-15 14:49:53,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:49:53,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:53,227 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 11 treesize of output 7 [2022-02-15 14:49:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:53,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:49:53,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:49:53,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-02-15 14:49:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:54,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662250077] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:49:54,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:49:54,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-02-15 14:49:54,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879477743] [2022-02-15 14:49:54,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:49:54,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 14:49:54,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:49:54,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 14:49:54,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 14:49:54,126 INFO L87 Difference]: Start difference. First operand 419 states and 836 transitions. Second operand has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 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) [2022-02-15 14:49:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:49:55,783 INFO L93 Difference]: Finished difference Result 723 states and 1419 transitions. [2022-02-15 14:49:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 14:49:55,783 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 14:49:55,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:49:55,784 INFO L225 Difference]: With dead ends: 723 [2022-02-15 14:49:55,784 INFO L226 Difference]: Without dead ends: 708 [2022-02-15 14:49:55,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=511, Invalid=3649, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 14:49:55,784 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 159 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:49:55,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 303 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:49:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-15 14:49:55,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 417. [2022-02-15 14:49:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0) internal successors, (832), 416 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:49:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 832 transitions. [2022-02-15 14:49:55,789 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 832 transitions. Word has length 30 [2022-02-15 14:49:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:49:55,789 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 832 transitions. [2022-02-15 14:49:55,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 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) [2022-02-15 14:49:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 832 transitions. [2022-02-15 14:49:55,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 14:49:55,790 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:49:55,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:49:55,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-02-15 14:49:55,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-02-15 14:49:55,990 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:49:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:49:55,990 INFO L85 PathProgramCache]: Analyzing trace with hash -412102985, now seen corresponding path program 202 times [2022-02-15 14:49:55,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:49:55,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990241995] [2022-02-15 14:49:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:49:55,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:49:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:49:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:49:56,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:49:56,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990241995] [2022-02-15 14:49:56,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990241995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:49:56,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420725686] [2022-02-15 14:49:56,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:49:56,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:56,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:49:56,269 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:49:56,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-15 14:49:56,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:49:56,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:49:56,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:49:56,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:49:56,361 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 15 treesize of output 7 Received shutdown request... [2022-02-15 14:49:56,504 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-15 14:49:56,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-02-15 14:49:56,520 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-15 14:49:56,525 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 [2022-02-15 14:49:56,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:49:56,705 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-4-1 term,while PolyPacSimplificationTermWalker was simplifying 4 xjuncts wrt. a ATOM-1 context. [2022-02-15 14:49:56,707 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-15 14:49:56,707 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-15 14:49:56,709 INFO L732 BasicCegarLoop]: Path program histogram: [202, 12, 1] [2022-02-15 14:49:56,711 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-15 14:49:56,711 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 14:49:56,713 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 02:49:56 BasicIcfg [2022-02-15 14:49:56,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 14:49:56,713 INFO L158 Benchmark]: Toolchain (without parser) took 715955.85ms. Allocated memory was 178.3MB in the beginning and 230.7MB in the end (delta: 52.4MB). Free memory was 136.0MB in the beginning and 179.3MB in the end (delta: -43.4MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. [2022-02-15 14:49:56,713 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 178.3MB. Free memory is still 137.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 14:49:56,713 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.42ms. Allocated memory is still 178.3MB. Free memory was 136.0MB in the beginning and 134.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 14:49:56,713 INFO L158 Benchmark]: Boogie Preprocessor took 13.81ms. Allocated memory is still 178.3MB. Free memory was 134.4MB in the beginning and 133.5MB in the end (delta: 901.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 14:49:56,713 INFO L158 Benchmark]: RCFGBuilder took 275.31ms. Allocated memory is still 178.3MB. Free memory was 133.4MB in the beginning and 124.1MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-15 14:49:56,714 INFO L158 Benchmark]: TraceAbstraction took 715635.01ms. Allocated memory was 178.3MB in the beginning and 230.7MB in the end (delta: 52.4MB). Free memory was 123.5MB in the beginning and 179.3MB in the end (delta: -55.8MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 14:49:56,714 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14ms. Allocated memory is still 178.3MB. Free memory is still 137.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.42ms. Allocated memory is still 178.3MB. Free memory was 136.0MB in the beginning and 134.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.81ms. Allocated memory is still 178.3MB. Free memory was 134.4MB in the beginning and 133.5MB in the end (delta: 901.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 275.31ms. Allocated memory is still 178.3MB. Free memory was 133.4MB in the beginning and 124.1MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 715635.01ms. Allocated memory was 178.3MB in the beginning and 230.7MB in the end (delta: 52.4MB). Free memory was 123.5MB in the beginning and 179.3MB in the end (delta: -55.8MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-4-1 term,while PolyPacSimplificationTermWalker was simplifying 4 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-4-1 term,while PolyPacSimplificationTermWalker was simplifying 4 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-4-1 term,while PolyPacSimplificationTermWalker was simplifying 4 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 715.5s, OverallIterations: 215, TraceHistogramMax: 2, PathProgramHistogramMax: 202, EmptinessCheckTime: 0.2s, AutomataDifference: 376.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 38979 SdHoareTripleChecker+Valid, 147.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38979 mSDsluCounter, 91639 SdHoareTripleChecker+Invalid, 124.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5426 IncrementalHoareTripleChecker+Unchecked, 159057 mSDsCounter, 18559 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 376720 IncrementalHoareTripleChecker+Invalid, 400705 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18559 mSolverCounterUnsat, 6686 mSDtfsCounter, 376720 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21764 GetRequests, 6148 SyntacticMatches, 1473 SemanticMatches, 14143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292430 ImplicationChecksByTransitivity, 377.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=435occurred in iteration=128, InterpolantAutomatonStates: 8578, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 214 MinimizatonAttempts, 74663 StatesRemovedByMinimization, 212 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 286.6s InterpolantComputationTime, 12533 NumberOfCodeBlocks, 12533 NumberOfCodeBlocksAsserted, 614 NumberOfCheckSat, 18132 ConstructedInterpolants, 119 QuantifiedInterpolants, 330996 SizeOfPredicates, 2858 NumberOfNonLiveVariables, 14348 ConjunctsInSsa, 6490 ConjunctsInUnsatCore, 636 InterpolantComputations, 3 PerfectInterpolantSequences, 8/4844 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